Heat exchange equipment and control method based on heat exchange equipment

Abstract

The invention provides heat exchange equipment and a control method based on the heat exchange equipment, the heat exchange equipment comprises a shell, the shell is provided with a first end and a second end which deviate from each other, the first end faces a first space and is provided with a fresh air port and an exhaust port, and the second end faces a second space and is provided with an air supply port and an air return port; the detection device is configured to obtain the air inlet temperature of the fresh air opening; the control device is configured to calculate the dew point temperature of the second space in the state that the air inlet temperature is higher than the preset temperature; the detection device is further configured to obtain the air supply temperature of the air supply outlet, and the control device is further configured to compare the air supply temperature with the dew point temperature.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical equipment, and in particular to a heat exchange device and a control method based on the heat exchange device. Background Art

[0002] The heat exchange device can be a fresh air device with a heat exchange unit, or other exhaust ventilation equipment with a fresh air device. The heat exchange unit includes a full heat exchange core, etc., which is suitable for heat exchange between the return air flow and the fresh air flow using temperature difference and / or steam partial pressure difference.

[0003] At present, when the above-mentioned heat exchange equipment is ventilating, due to the temperature and humidity differences in different spaces; and in the dehumidification mode, the condenser located downstream of the evaporator fails or the heat exchange area is insufficient. It is easy for the low-temperature air passing through the heat exchange equipment to contact the higher-temperature air in the space, and condensation will occur in the pipes of the heat exchange equipment. If the condensation is too much, it may cause the dew to accumulate and even overflow outside the heat exchange equipment.

[0004] For this reason, a preset temperature is usually configured when the heat exchange equipment is running, and when the air inlet temperature of the fresh air flow entering from the fresh air outlet is lower than the preset temperature, it will actively switch to an operation mode suitable for reducing condensation. However, in actual usage scenarios, the dew point temperature in the space is affected by many factors such as temperature, humidity, and vapor pressure. Therefore, when the air inlet temperature is higher than the preset temperature, more condensation may still occur. Summary of the invention

[0005] In view of the above background technology problems, the present disclosure provides a heat exchange device and a control method based on the heat exchange device to at least partially solve the above problems.

[0006] The present disclosure provides a heat exchange device, comprising: a shell, the shell having a first end and a second end facing away from each other, the first end facing a first space, having a fresh air inlet and an exhaust outlet, the second end facing a second space, having a supply air inlet and a return air inlet; a detection device, configured to obtain an inlet air temperature of the fresh air inlet; and a control device, configured to calculate a dew point temperature of the second space when the inlet air temperature is higher than a preset temperature; wherein the detection device is further configured to obtain the supply air temperature of the supply air outlet, and the control device is further configured to compare the supply air temperature and the dew point temperature.

[0007] In some exemplary embodiments, the detection device is further configured to further obtain the return air temperature and return air humidity of the return air outlet when the inlet air temperature is higher than a preset temperature; the control device is further configured to calculate the dew point temperature of the second space based on the return air temperature and the return air humidity.

[0008] In some exemplary embodiments, the detection device includes: a first sensor configured to obtain the inlet air temperature; a second sensor configured to obtain the return air temperature and the return air humidity; and a third sensor configured to obtain the supply air temperature.

[0009] In some exemplary embodiments, when the supply air temperature is lower than the dew point temperature and remains lower than the dew point temperature for a preset period of time, the control device is further configured to increase the supply air temperature of the heat exchange device.

[0010] In some exemplary embodiments, the heat exchange device also includes: a first partition plate, arranged between the first end and the second end, so as to divide the inside of the shell into a first area and a second area, the exhaust port and the supply air port are located in the first area, and the fresh air port and the return air port are located in the second area; a second partition plate, arranged in a portion of the first area between the exhaust port and the supply air port, so as to divide the first area into an exhaust air chamber and a supply air chamber; and a heat exchange unit, arranged in a portion of the second area between the fresh air port and the return air port, so as to divide the second area into a fresh air chamber and a return air chamber.

[0011] In some exemplary embodiments, the heat exchange device also includes a first bypass air valve, which is arranged between the above-mentioned fresh air chamber and the above-mentioned exhaust air chamber, and has an open state that connects the above-mentioned fresh air chamber and the above-mentioned exhaust air chamber, and a closed state that isolates the fresh air chamber and the above-mentioned exhaust air chamber.

[0012] In some exemplary embodiments, the heat exchange device has an internal circulation mode; when the heat exchange device is in the internal circulation mode, the return air outlet, the return air chamber, the exhaust air chamber, the first bypass air valve, the fresh air chamber, the heat exchange unit, the supply air chamber and the supply air outlet are connected in sequence according to the air flow direction, so that the return air entering the heat exchange device from the second space returns to the second space through the supply air outlet.

[0013] In some exemplary embodiments, the heat exchange device further includes a second bypass air valve, which is disposed on the first partition plate and has an open state for connecting the return air chamber and the exhaust air chamber, and a closed state for isolating the return air chamber and the exhaust air chamber.

[0014] In some exemplary embodiments, the heat exchange device further has a heat exchange mode; when the heat exchange device is in the heat exchange mode, the fresh air chamber and the supply air chamber are connected, the exhaust air chamber and the return air chamber are connected, and the fresh air flow entering from the fresh air port and the return air flow entering from the return air port are heat exchanged in the heat exchange unit.

[0015] In some exemplary embodiments, the heat exchange device further has a ventilation mode; when the heat exchange device is in the ventilation mode, the fresh air chamber, the heat exchange unit and the supply air chamber are connected in sequence according to the airflow direction, and the return air chamber is connected to the exhaust air chamber via the second bypass air valve; wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to be adjusted from the ventilation mode to the internal circulation mode, or, to be adjusted from the ventilation mode to the heat exchange mode.

[0016] In some exemplary embodiments, the heat exchange equipment also includes a temperature control device with a refrigerant circulation, and the temperature control device includes: a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger are both arranged in the air supply plenum, and the first heat exchanger is located on the upstream side of the air path of the air supply plenum; wherein the heat exchange equipment has a dehumidification mode with the first heat exchanger as an evaporator and the second heat exchanger as a condenser.

[0017] In some exemplary embodiments, the heat exchange area of ​​the first heat exchanger is configured to be greater than or equal to the heat exchange area of ​​the second heat exchanger; the temperature control device also includes: a third heat exchanger, which is arranged in the exhaust air chamber; wherein, in the dehumidification mode, the third heat exchanger is used as a condenser.

[0018] In some exemplary embodiments, the temperature control device further includes: a compressor configured to compress the refrigerant; and a distribution component disposed between the compressor and the first heat exchanger, the second heat exchanger, and the third heat exchanger, and configured to distribute the refrigerant between the first heat exchanger, the second heat exchanger, and the third heat exchanger; wherein the compressor is disposed in the exhaust air chamber.

[0019] In some exemplary embodiments, the heat exchange device has a first dehumidification mode; when the heat exchange device is in the first dehumidification mode, the fresh air chamber and the supply air chamber are connected, the exhaust air chamber and the return air chamber are connected, and the fresh air flow entering from the fresh air outlet and the return air flow entering from the return air outlet perform heat exchange in the heat exchange unit; wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from running, or, to adjust to the internal circulation mode that stops the temperature control device from running, or, to adjust to the heat exchange mode that stops the temperature control device from running.

[0020] In some exemplary embodiments, the heat exchange device has a second dehumidification mode; when the heat exchange device is in the second dehumidification mode, the fresh air chamber and the exhaust air chamber are connected, and the return air chamber and the supply air chamber are connected; wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from running, or, to adjust to the internal circulation mode that stops the temperature control device from running, or, to adjust to the heat exchange mode that stops the temperature control device.

[0021] In some exemplary embodiments, the heat exchange device has a third dehumidification mode; when the heat exchange device is in the third dehumidification mode, the fresh air chamber is connected to the supply air chamber, and the return air chamber is connected to the exhaust air chamber via the second bypass air valve; wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to be adjusted from the third dehumidification mode to the internal circulation mode in which the temperature control device stops operating, or to the heat exchange mode in which the temperature control device stops operating.

[0022] In some exemplary embodiments, the heat exchange unit includes an air inlet side for air intake and an air outlet side for air outlet, and the air inlet side and the air outlet side are arranged in a vertical direction; the heat exchange device also includes a horizontally arranged third partition plate, which is arranged between the air outlet side and the air inlet side to isolate the air outlet side from the air inlet side.

[0023] In some exemplary embodiments, the first partition and the first end are spaced apart; the heat exchange device further comprises a vertically arranged fourth partition, which is arranged at the end of the first partition facing the first end; a first bypass air duct is defined between the fourth partition and the inner wall of the first end, and the first bypass air valve is arranged in the first bypass air duct.

[0024] In some exemplary embodiments, it further includes a fifth partition plate arranged horizontally, the fifth partition plate being arranged in the air supply plenum to separate the air supply plenum into a first part located at the top and a second part located below the first part; a second bypass air duct is defined between the first partition plate, the second part, the second partition plate and the inner wall facing the shell, and the second bypass air valve is arranged at a position of the first partition plate facing the second bypass air duct. In some exemplary embodiments, the heat exchange unit has six side surfaces; the upper side surface and the lower side surface facing each other are connected to the shell, the first air inlet surface and the second air inlet surface adjacent to the lower side surface are used as the air inlet side, and the first air outlet surface and the second air outlet surface adjacent to the upper side surface are used as the air outlet side; wherein the first air inlet surface and the first air outlet surface are connected through the internal space of the heat exchange unit, and the second air inlet surface and the second air outlet surface are connected through the internal space of the heat exchange unit.

[0025] In some exemplary embodiments, the first air inlet surface faces the fresh air outlet, and the first air outlet surface faces the return air outlet; the second air inlet surface faces the return air outlet, and the second air outlet surface faces the fresh air outlet.

[0026] In some exemplary embodiments, a first air valve is disposed at an upper portion of the third partition, facing the second air outlet surface; a second air valve is disposed at an upper portion of the third partition, facing the first air outlet surface; a third air valve is disposed at a lower portion of the third partition, facing the first air inlet surface; and a fourth air valve is disposed at a lower portion of the third partition, facing the second air inlet surface.

[0027] In some exemplary embodiments, the heat exchange device further includes an exhaust fan disposed in the exhaust air chamber; and an air supply fan disposed in the air supply air chamber.

[0028] The present disclosure also provides a control method for a heat exchange device, comprising: obtaining the air inlet temperature of the fresh air outlet of the heat exchange device, and when the air inlet temperature is higher than a preset temperature, calculating the dew point temperature of a second space where the heat exchange device is located; obtaining the air supply temperature of the air supply outlet of the heat exchange device, and comparing the air supply temperature and the dew point temperature.

[0029] In some exemplary embodiments, the above-mentioned calculation of the dew point temperature of the second space where the above-mentioned heat exchange device is located includes: calculating the above-mentioned dew point temperature according to the return air temperature and return air humidity of the above-mentioned heat exchange device.

[0030] In some exemplary embodiments, the control method further includes: when the supply air temperature is lower than the dew point temperature and remains lower than the dew point temperature for a preset period of time, increasing the supply air temperature of the heat exchange device.

[0031] In some exemplary embodiments, the supply air temperature of the heat exchange device is increased when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, including: when the heat exchange device is in a ventilation mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, adjusting the heat exchange device to an internal circulation mode, or to a heat exchange mode.

[0032] In some exemplary embodiments, the supply air temperature of the heat exchange device is increased when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, including: when the heat exchange device is in a dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, adjusting the heat exchange device to an internal circulation mode in which the temperature control device stops operating, or adjusting the heat exchange mode in which the temperature control device stops operating.

[0033] In some exemplary embodiments, when the supply air temperature is lower than the dew point temperature and lasts for a preset time, the supply air temperature of the heat exchange device is increased, including: when the heat exchange device is in the first dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset time, the heat exchange device is configured to stop the temperature control device, or adjust to the internal circulation mode in which the temperature control device stops, or adjust to the heat exchange mode in which the temperature control device stops; and / or when the heat exchange device is in the second dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset time, the heat exchange device is configured to stop the temperature control device, or adjust to the internal circulation mode in which the temperature control device stops, or adjust to the heat exchange mode in which the temperature control device stops.

[0034] In some exemplary embodiments, when the supply air temperature is lower than the dew point temperature and continues for a preset period of time, the supply air temperature of the heat exchange device is increased, including: when the heat exchange device is in the third dehumidification mode, when the supply air temperature is lower than the dew point temperature and continues for a preset period of time, the heat exchange device is adjusted to an internal circulation mode in which the temperature control device stops operating, or adjusted to a heat exchange mode in which the temperature control device stops operating.

[0035] In some exemplary embodiments, the control method further includes: obtaining the inlet air temperature of the fresh air outlet of the heat exchange device, and when the inlet air temperature is lower than a preset temperature, adjusting the heat exchange device to an internal circulation mode, or adjusting to a heat exchange mode.

[0036] Based on the above-mentioned heat exchange device and the control method based on the heat exchange device, the detection device of the heat exchange device will not only obtain the inlet temperature of the fresh air flow entering the fresh air outlet, but also further calculate the dew point temperature of the second space through the control device when the inlet temperature is higher than the preset temperature. On this basis, the detection device of the heat exchange device also detects the supply air temperature of the air outlet and compares the supply air temperature with the dew point temperature. In other words, the heat exchange device not only relies on the static preset temperature to determine whether condensation is likely to occur, but also dynamically obtains the dew point temperature of the second space to further determine the supply air temperature higher than the preset temperature. On this basis, since the temperature of the fresh air flow may change when passing through the heat exchange device, the heat exchange device will also compare the supply air temperature entering the second space after being processed by the heat exchange device with the dew point temperature, thereby further improving the accuracy of the judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present disclosure or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a schematic diagram of a heat exchange device in a top view according to an embodiment of the present disclosure, with part of the shell omitted;

[0039] Figure 2 yes Figure 1 A partial cross-sectional view along the AA direction;

[0040] Figure 3 is a schematic diagram of an air path of a heat exchange device in an internal circulation mode according to an embodiment of the present disclosure;

[0041] Figure 4 is a schematic diagram of an air path of a heat exchange device in a heat exchange loop mode according to an embodiment of the present disclosure;

[0042] Figure 5 is a schematic diagram of an air path of a heat exchange device in a ventilation mode according to an embodiment of the present disclosure;

[0043] Figure 6 is a schematic diagram of an air path of a heat exchange device in a mixed air mode according to an embodiment of the present disclosure;

[0044] Figure 7 is a schematic diagram of an air path of a heat exchange device in a first dehumidification mode according to an embodiment of the present disclosure;

[0045] Figure 8is a schematic diagram of an air path of a heat exchange device in a second dehumidification mode according to an embodiment of the present disclosure;

[0046] Fig. 9 is a schematic diagram of an air path of a heat exchange device in a third dehumidification mode according to an embodiment of the present disclosure;

[0047] Fig.10 is a schematic diagram of an air path of a heat exchange device in a heating mode according to an embodiment of the present disclosure;

[0048] Fig.11 is a schematic diagram of a pipeline of a temperature control device of a heat exchange device according to an embodiment of the present disclosure;

[0049] Fig.12 is a flow chart of a control method of a heat exchange device according to an embodiment of the present disclosure;

[0050] Fig.13 Yes Fig.12 A flow chart of an exemplary embodiment of a control method is shown.

[0051] Reference numerals

[0052] 1. Shell; 101. Exhaust air chamber; 102. Supply air chamber; 103. Return air chamber; 104. Fresh air chamber;

[0053] 2. Exhaust fan;

[0054] 3. Temperature control device; 301. First heat exchanger; 302. Second heat exchanger; 303. Third heat exchanger; 304. Compressor; 305. First flow control valve; 306. Second flow control valve; 307. Four-way reversing valve;

[0055] 4. Air supply outlet; 5. Air supply fan; 6. Fifth partition;

[0056] 7. first partition; 701. first section; 702. second section;

[0057] 8. Second bypass ventilation valve; 9. Return air outlet; 10. Second air valve; 11. Third partition;

[0058] 12. heat exchange unit; 1201. first air inlet surface; 1202. second air inlet surface; 1203. first air outlet surface; 1204. second air outlet surface;

[0059] 13. First air valve; 14. Fresh air outlet; 15. First bypass air valve; 16. Exhaust outlet; 17. Fourth partition; 18. Second partition; 19. Third air valve; 20. Fourth air valve. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0061] In the description of the present disclosure, it should be noted that the terms "vertical", "horizontal", "left", "right", "up", "down", "front", "back" and similar expressions are for illustrative purposes only and do not represent the only implementation method.

[0062] Furthermore, the ordinal numbers used in the specification and claims, such as "first", "second", etc., to modify the corresponding elements, do not themselves mean or represent any ordinal number of the element, nor do they represent the order of one element and another element, or the order of manufacturing methods. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0063] In addition, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood in specific situations.

[0064] The heat exchange device may be a fresh air device with a heat exchange unit, or other exhaust ventilation equipment with a heat exchange unit. The heat exchange device has multiple operating modes, such as a ventilation mode in which the temperature control device is not in operation, and other operating modes in which the temperature control device intervenes to cool or heat the air passing through the heat exchange device. In some usage scenarios, it is easy for the air in the second space to be cooled, which in turn causes water vapor in the air to condense in the indoor pipes.

[0065] For example, when heat exchange equipment is configured in indoor and outdoor ventilation scenarios, there is a large temperature difference between indoor and outdoor spaces, and the indoor humidity is high. At this time, when the lower temperature outdoor air enters the room, it will cool the air near the indoor air outlet, and then the water vapor in the air will condense on the outer wall of the indoor pipe (such as the pipe near the air outlet), forming condensation.

[0066] For another example, when the temperature control device is running to turn on the dehumidification mode of the heat exchange equipment, the outdoor air passes through the evaporator to release water and then enters the room. However, the condenser located on the downstream side of the evaporator cannot effectively heat up the dehumidified air due to insufficient heat exchange area or failure. As a result, the air near the air supply outlet in the room will also become cold, causing the water vapor to condense on the outer wall of the indoor pipe (such as the pipe near the air supply outlet), forming condensation.

[0067] At present, for the above-mentioned usage scenarios, in order to prevent or reduce condensation, the heat exchange equipment is often configured with a corresponding preset temperature, and when the inlet air temperature is lower than the preset temperature, the heat exchange equipment is switched to a suitable operating mode to increase the air supply temperature of the heat exchange equipment. However, in the prior art, the above-mentioned preset temperatures are mostly obtained based on empirical values ​​and / or calculated values. For this reason, the heat exchange equipment lacks flexibility in judging whether condensation will occur, and it is difficult to adapt to some usage scenarios where the inlet air temperature is higher than the preset temperature but still causes condensation in the heat exchange equipment (such as the temperature difference between the second space and the first space is large, or the humidity in the second space is high, etc.). This will make it difficult for the heat exchange equipment to switch to an operating mode suitable for reducing condensation, which will cause condensation to accumulate on the outer wall of the indoor pipe, and cause the condensed water to fall on the installation foundation (such as the ceiling) under the action of its own weight.

[0068] Therefore, how to provide a heat exchange device that can more accurately predict condensation conditions and reduce condensation according to the predicted condensation conditions has become a technical problem that needs to be solved urgently.

[0069] Figure 1 This is a schematic diagram of a heat exchange device according to an embodiment of the present disclosure from a top view, with part of the shell omitted. Figure 2 yes Figure 1 A partial cross-sectional view taken along the AA direction.

[0070] The present disclosure provides a heat exchange device, such as Figure 1 and Figure 2 As shown, it includes a shell 1, a detection device and a control device. The shell 1 has a first end and a second end facing away from each other. The first end faces the first space and has a fresh air inlet 14 and an exhaust outlet 16. The second end faces the second space and has an air supply outlet 4 and a return air outlet 9. The detection device is configured to obtain the air inlet temperature of the fresh air inlet 14. The control device is configured to calculate the dew point temperature of the second space when the air inlet temperature is higher than the preset temperature. Among them, the detection device is also configured to obtain the air supply temperature of the air supply outlet 4, and the control device is also configured to compare the air supply temperature and the dew point temperature.

[0071] like Figure 1 and Figure 2As shown, the housing 1 has a width direction (X direction), a height direction (Y direction) and a length direction (Z direction). Unless otherwise specified, the thickness direction, height direction and length direction of the housing 1 can be as follows Figure 1 and Figure 2 The following describes the embodiments of the present disclosure in conjunction with the accompanying drawings.

[0072] In some exemplary implementations, Figure 1 and Figure 2 As shown, the housing 1 includes but is not limited to being configured as a roughly cubic structure, having first ends (such as Figure 1 The left end) and the second end (such as Figure 1 The first end faces the first space, and the second end faces the second space, wherein the first space and the second space are characterized as two different independent spaces, such as the first space is an outdoor space, and the second space is an indoor space, or the first space is a room, and the second space is another room. In this way, the heat exchange device is configured to perform ventilation operations in different first and second spaces. Of course, it is also possible to further perform at least one of auxiliary heating operations, cooling operations, dehumidification operations, purification operations, and other operations suitable for improving the air quality parameters of the second space during the ventilation operation.

[0073] For the convenience of describing the embodiments, unless otherwise specified, the first space in the following embodiments may be understood as an outdoor space, and the second space may be understood as an indoor space.

[0074] Continue as Figure 1 and Figure 2 As shown, the fresh air inlet 14 and the exhaust air outlet 16 are arranged side by side along the width direction at the first end, and the corresponding air supply outlet 4 and the return air outlet 9 are arranged side by side along the width direction at the second end. From the outside, it can be understood that the exhaust air outlet 16 and the air supply outlet 4 are arranged in opposite directions, and the fresh air inlet 14 and the return air outlet 9 are arranged in opposite directions. That is, taking the above-mentioned roughly cubic structure housing 1 as an example, the fresh air inlet 14 is arranged diagonally with the air supply outlet 4, and the exhaust air outlet 16 and the return air outlet 9 are arranged diagonally. It should be understood that the embodiments of the present disclosure are not limited to this.

[0075] For example, the fresh air inlet 14 and the air supply outlet 4 may also be arranged in opposite directions, and correspondingly, the exhaust outlet 16 and the return air outlet 9 may also be arranged in opposite directions, specifically, it should be appropriate to satisfy the reasonable arrangement of the space defined in the shell 1.

[0076] On this basis, the fresh air inlet 14 is suitable for guiding the air in the first space into the heat exchange device, and the return air inlet 9 is suitable for guiding the air in the second space into the heat exchange device. Further, the air supply outlet 4 is suitable for guiding the air in the heat exchange device (the air can be either the fresh air flow entering from the fresh air inlet 14 or the return air flow entering from the return air inlet 9) to the second space, and the exhaust outlet 16 is suitable for guiding the air in the heat exchange device (the air can be either the fresh air flow entering from the fresh air inlet 14 or the return air flow entering from the return air inlet 9) to the first space. In this way, ventilation between the first space and the second space can be achieved, or the treatment of the air in the first space (such as the above-mentioned cooling, heating, dehumidification and purification, etc.) can also be achieved.

[0077] It should be noted that corresponding air paths are arranged between at least two of the above-mentioned fresh air inlet 14, return air inlet 9, air supply inlet 4 and exhaust air inlet 16, and these air paths are adjustable so that the air has different flow directions in the heat exchange device, thereby making the heat exchange device have different operating modes. This will be specifically described in the following embodiments.

[0078] In some exemplary embodiments, a filtering device may be configured on the upstream side of at least a portion of the fresh air inlet 14, the return air inlet 9, the supply air inlet 4 and the exhaust air inlet 16, such as a filter screen, filter material, etc., to filter at least a portion of the dust, particles and other impurities entrained in the air.

[0079] In some exemplary embodiments, the detection device of the heat exchange device includes a sensor. Specifically, it includes a temperature sensor, a humidity sensor, and a temperature and humidity sensor. Furthermore, the control device of the heat exchange device may be a microcontroller (MCU), a PLC (programmable logic controller), or other control devices suitable for collecting signals and outputting control signals to other devices of the heat exchange device based on the collected signals. The detection device is connected to the control device in communication to achieve signal and / or data transmission.

[0080] It should be noted here that the detection device and the control device are not the key points of protection of the present disclosure. Any detection device and control device that can be used for heat exchange equipment in the art can be selected and applied, and no further elaboration will be given.

[0081] In some exemplary embodiments, the heat exchange device is configured with a preset temperature (such as configuring the preset temperature through a control device), which can be an empirical value, a calculated value, or a calculated value obtained by further calculation based on the empirical value. The preset temperature can be understood as the air entering through the fresh air outlet 14 is prone to condensation on the outer wall of the pipe of the heat exchange device (such as the pipe located near the air outlet 4) under the preset temperature condition. The preset temperature includes but is not limited to 12°C, or 10°C, 11°C, 12°C, 13°C, 14°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C and any other temperature.

[0082] According to an embodiment of the present disclosure, the detection device is further configured to obtain the return air temperature and return air humidity of the return air outlet 9 when the inlet air temperature is higher than the preset temperature. The control device is further configured to calculate the dew point temperature of the second space according to the return air temperature and return air humidity.

[0083] In some exemplary embodiments, the dew point temperature of the second space can be calculated based on the return air temperature and return air humidity of the return air outlet 9 obtained by the detection device, specifically including:

[0084] The saturated vapor pressure at the return air temperature (i.e., the temperature of the second space) can be obtained by consulting the vapor pressure table; then, the actual vapor pressure can be calculated by the return air humidity and the guaranteed vapor pressure, that is, actual vapor pressure = relative humidity × saturated vapor pressure; then, the actual vapor pressure is substituted into the Clausius-Clapeyron equation to reversely calculate the dew point temperature.

[0085] ln(P / P0) = (ΔHvap / R) * (1 / T0 - 1 / T), Equation 1 (i.e., Clausius-Clapeyron equation)

[0086] Where P represents the actual vapor pressure; P0 represents the saturated vapor pressure at 0°C (611.73 Pa); ΔHvap represents the latent heat of vaporization of water (2501 kJ / kg); R represents the gas constant (8.314 J / (mol·K)); T0 represents the absolute temperature at 0°C (273.15 K); and T represents the condensation temperature.

[0087] For example, when the return air temperature is 20°C and the return air humidity (i.e., the relative humidity of the second space) is 70%, the protective vapor pressure table is consulted to obtain that the saturated vapor pressure corresponding to 20°C is 2339.2 Pa; the actual vapor pressure = 0.7 × 2339.2 Pa = 1637.5 Pa; the actual vapor pressure is substituted into the Clausius-Clapeyron equation to calculate that the dew point temperature of the second space is about 15.6°C. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0088] For example, the dew point temperature can also be obtained through a psychrometric diagram or any other method.

[0089] Based on the preset temperature, when the detection device of the heat exchange device detects that the air inlet temperature of the fresh air outlet 14 is higher than the preset temperature, the control device further calculates the dew point temperature of the second space, and the detection device obtains the supply air temperature of the air supply outlet 4. On this basis, the control device also compares the supply air temperature with the dew point temperature to determine whether condensation will occur when the heat exchange device supplies air at the supply air temperature.

[0090] In such an embodiment, the heat exchange device detects the air inlet temperature of the fresh air outlet 14 based on the detection device, and when the air inlet temperature is higher than the preset temperature, the control device further calculates the dew point temperature of the second space. On this basis, the detection device also detects the air supply temperature of the air supply outlet 4, and compares the air supply temperature with the dew point temperature.

[0091] That is to say, compared with the prior art, the heat exchange device is configured to judge the condensation condition not only by the static preset temperature, but also by the dynamic dew point temperature of the second space, so as to improve the accuracy of judging whether condensation is likely to occur. On this basis, since the temperature of the fresh air may change when passing through the heat exchange device, the heat exchange device uses the method of comparing the supply air temperature with the dew point temperature, which is also conducive to further improving the accuracy of the judgment.

[0092] According to an embodiment of the present disclosure, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the control device is further configured to increase the supply air temperature of the heat exchange device.

[0093] Based on the dew point temperature and the comparison result between the dew point temperature and the supply air temperature in the above embodiment, if the supply air temperature at this time is lower than the dew point temperature and lasts for a preset time, it is considered that the supply air flow output through the air supply port 4 is prone to condensation in the second space. To this end, the heat exchange device is further configured to increase the supply air temperature. For example, the supply air temperature can be increased to above the dew point temperature, thereby reducing or even avoiding the occurrence of condensation. Among them, the preset time includes but is not limited to 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes and any other operating time. The reason for setting the operating time is to prevent the temperature fluctuations caused by the cooling and heating process of the heat exchange device from affecting its judgment.

[0094] According to the embodiments of the present disclosure, Figure 1 and Figure 2As shown, the heat exchange device further includes a first partition 7, a second partition 18 and a heat exchange unit 12. The first partition 7 is arranged between the first end and the second end to divide the inside of the housing 1 into a first area and a second area, the exhaust port 16 and the supply port 4 are located in the first area, and the fresh air port 14 and the return air port 9 are located in the second area. The second partition 18 is arranged in the portion of the first area between the exhaust port 16 and the supply air port 4 to divide the first area into an exhaust air chamber 101 and a supply air chamber 102. The heat exchange unit 12 is arranged in the portion of the second area between the fresh air port 14 and the return air port 9 to divide the second area into a fresh air chamber 104 and a return air chamber 103.

[0095] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange device also includes a first bypass air valve 15, which is arranged between the fresh air chamber 104 and the exhaust air chamber 101, and has an open state that connects the fresh air chamber 104 and the exhaust air chamber 101, and a closed state that isolates the fresh air chamber 104 and the exhaust air chamber 101.

[0096] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange device further includes a second bypass ventilator 8. The second bypass ventilator 8 is disposed on the first partition plate 7 and has an open state for connecting the return air chamber 103 with the exhaust air chamber 101 and a closed state for isolating the return air chamber 103 from the exhaust air chamber 101.

[0097] In some exemplary embodiments, the first partition 7 is arranged along the length direction of the shell 1, and is located between the first end and the second end. The first partition 7 includes a first section 701 and a second section 702, and the first section 701 and the second section 702 are arranged at intervals, so that the middle part of the first partition 7 is hollowed out to form an air duct connected to the air outlet side of the heat exchange unit 12 (which will be described in the following embodiments). The second partition 18 is located in the hollowed-out part formed by the first partition 7, and is located between the first air outlet surface 1203 and the second air outlet surface 1204 of the heat exchange unit 12. The second partition 18 includes but is not limited to a plate-like structure configured as a substantially L-shape, one end of which extends along the width direction of the shell 1 to separate the above-mentioned air duct into two isolated parts, and the part of the two parts including the exhaust port 16 forms an exhaust air chamber 101, and the part including the air supply port 4 forms an air supply air chamber 102. Further, the other end of the second partition 18 is bent toward the air supply port 4 and is spaced from the inner wall of the shell 1.

[0098] According to an embodiment of the present disclosure, the first baffle 7 and the first end of the heat exchange device are spaced apart. The heat exchange device further comprises a fourth baffle 17 arranged vertically, and the fourth baffle 17 is arranged at the end of the first baffle 7 facing the first end. A first bypass air passage is defined between the fourth baffle 17 and the inner wall of the first end, and a first bypass air valve 15 is arranged in the first bypass air passage.

[0099] According to an embodiment of the present disclosure, the heat exchange device further includes a fifth partition plate 6 disposed horizontally. The fifth partition plate 6 is disposed in the air supply plenum 102 to separate the air supply plenum 102 into a first portion located at the upper portion and a second portion located below the first portion. A second bypass air duct is defined between the first partition plate 7, the second portion, the second partition plate 18, and the inner wall facing the housing 1, and a second bypass air valve 8 is disposed at a position of the first partition plate 7 facing the second bypass air duct.

[0100] In some exemplary embodiments, the end of the first partition plate 7 facing the first end is spaced apart from the first end, and the end is further provided with a fourth partition plate 17. In detail, the fourth partition plate 17 extends along the width direction of the housing 1, and a first bypass air passage is formed between the fourth partition plate 17 and the inner wall of the first end of the housing 1. Further, a first bypass air valve 15 is provided in the first bypass air passage, and is suitable for connecting or isolating the exhaust air chamber 101 and the fresh air chamber 104.

[0101] Furthermore, the heat exchange device also includes a fifth partition plate 6, which is disposed in the air supply chamber 102 and arranged in the horizontal direction to separate the air supply chamber 102 into an isolated upper part and a lower part along the height direction of the shell 1. The upper part is used to install the air supply port 4 (which will be described in the following embodiment), and the lower part is connected with the end of the second partition plate 18 bent toward the air supply port 4 and the part defined by the inner wall of the shell 1 to form a second bypass air duct connected with the exhaust air chamber 101. The first partition plate 7 is provided with a second bypass air valve 8 at a position facing the lower part. When the second bypass air valve 8 is in an open state, the return air chamber 103 can be connected with the exhaust air chamber 101 through the second bypass air duct.

[0102] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange unit 12 includes an air inlet side for air intake and an air outlet side for air outlet, and the air inlet side and the air outlet side are arranged in a vertical direction. The heat exchange device also includes a third partition plate 11 arranged horizontally, which is arranged between the air outlet side and the air inlet side to isolate the air outlet side from the air inlet side.

[0103] like Figure 1 and Figure 2 According to the embodiment of the present disclosure, as shown Figure 1 and Figure 2As shown, the heat exchange unit 12 has six side surfaces. The upper side surface and the lower side surface facing each other are connected to the housing 1, the first air inlet surface 1201 and the first air inlet surface 1202 adjacent to the lower side surface are used as the air inlet side, and the first air outlet surface 1203 and the second air outlet surface 1204 adjacent to the upper side surface are used as the air outlet side. Among them, the first air inlet surface 1201 and the first air outlet surface 1203 are connected through the internal space of the heat exchange unit 12, and the first air inlet surface 1202 and the second air outlet surface 1204 are connected through the internal space of the heat exchange unit 12.

[0104] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the heat exchange unit 12 is configured as a hexagonal prism, and the facing sides of the hexagonal prism are parallel.

[0105] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the heat exchange unit 12 includes but is not limited to using a full heat exchange core. In detail, the full heat exchange core includes but is not limited to being configured as a roughly hexagonal prism structure, that is, the end face (or cross section) of the full heat exchange core is hexagonal, the top face of the hexagon located at the upper part is close to the top face of the shell 1, and a gap is left between the bottom face and the bottom face of the shell 1 to form an air duct or air chamber through which air passes.

[0106] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the first air inlet surface 1201 faces the fresh air outlet 14, and the first air outlet surface 1203 faces the return air outlet 9. The first air inlet surface 1202 faces the return air outlet 9, and the second air outlet surface 1204 faces the fresh air outlet 14.

[0107] In some exemplary embodiments, the heat exchange unit 12 includes a plurality of bonded thin plates. Specifically, the lower portion of the hexagonal prism structure heat exchange unit 12 is used as the first air inlet surface 1201 and the first air inlet surface 1202, and the upper portion of the hexagonal prism structure heat exchange unit 12 is used as the first air outlet surface 1203 and the second air outlet surface 1204. Further, the first air inlet surface 1201 and the second air outlet surface 1204 are arranged facing the fresh air inlet 14, and the first air inlet surface 1202 and the first air outlet surface 1203 are arranged facing the return air inlet 9.

[0108] Among them, the fresh air flow entering through the fresh air port 14 can cross-circulate with the return air flow entering through the return air port 9 in the heat exchange unit 12. For example, in some modes of the heat exchange device, the fresh air flow can flow from the first air inlet surface 1201 to the first air outlet surface 1203, and the return air flow can flow from the first air inlet surface 1202 to the second air outlet surface 1204, so that the fresh air flow and the return air flow pass through the heat exchange unit 12 without interfering with each other and form heat exchange. It should be understood that the embodiments of the present disclosure are not limited to this.

[0109] In other exemplary embodiments, the heat exchange unit 12 is configured as a polygonal column and has at least four side surfaces, wherein the four side surfaces are the first air outlet surface 1203, the second air outlet surface 1204, the first air inlet surface 1201 and the first air inlet surface 1202, respectively, and the specific arrangement thereof is similar to the above-mentioned embodiment, and therefore, will not be described in detail.

[0110] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, a first air valve 13 is disposed at the upper portion of the third partition plate 11, facing the second air outlet surface 1204. A second air valve 10 is disposed at the upper portion of the third partition plate 11, facing the first air outlet surface 1203. A third air valve 19 is disposed at the lower portion of the third partition plate 11, facing the first air inlet surface 1201. A fourth air valve 20 is disposed at the lower portion of the third partition plate 11, facing the first air inlet surface 1202.

[0111] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the first air valve 13 and the second air valve 10 are stacked on the portion of the third partition 11 facing the fresh air inlet 14. In detail, the first air valve 13 and the second air valve 10 are both connected to the control device for communication, so as to have an open state and a closed state under the control of the control device. Similarly, the third air valve 19 and the fourth air valve 20 are stacked on the portion of the third partition 11 facing the return air inlet 9. In detail, the third air valve 19 and the fourth air valve 20 are both connected to the control device for communication, so as to have an open state and a closed state under the control of the control device. Among them, the third air valve 19 and the fourth air valve 20 are both arranged on the upstream side of the air inlet side of the heat exchange unit 12. In this way, by opening and closing the third air valve 19 and the fourth air valve 20, the air flow can enter or be isolated from the air inlet side.

[0112] In such an embodiment, by adjusting the opening and closing states of the first air valve 13, the second air valve 10, the third air valve 19, and the fourth air valve 20, the fresh air flow and / or the return air flow can flow sequentially in at least two air chambers among the fresh air chamber 104, the return air chamber 103, the supply air chamber 102, and the exhaust air chamber 101, thereby changing the air path of the air flow in the heat exchange device to adapt to different operating modes.

[0113] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the detection device includes a first sensor, a second sensor and a third sensor. The first sensor is configured to obtain the inlet air temperature. The second sensor is configured to obtain the return air temperature and the return air humidity. The third sensor is configured to obtain the supply air temperature.

[0114] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the first sensor and / or the third sensor include but are not limited to temperature sensors. Specifically, the first sensor is but are not limited to being arranged in the fresh air chamber 104, and the third sensor is but are not limited to being arranged in the supply air chamber 102, so as to respectively collect the inlet air temperature and the supply air temperature.

[0115] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the second sensor includes but is not limited to a temperature and humidity sensor, or a temperature sensor and a humidity sensor. In detail, the second sensor includes but is not limited to being arranged in the return air chamber 103, so as to respectively collect the return air temperature and the return air humidity.

[0116] According to other embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange device further includes an exhaust fan 2 and an air supply fan 5. The exhaust fan 2 is arranged in the exhaust air chamber 101. The air supply fan 5 is arranged in the air supply air chamber 102.

[0117] In some exemplary embodiments, the exhaust fan 2 and / or the air supply fan 5 include but are not limited to an axial flow fan. In detail, the axial flow fan includes a motor, an impeller, a wind tube, a wind collector, a fairing and a shell. Further, the exhaust end of the exhaust fan 2 is connected to the exhaust port 16, and correspondingly, the exhaust end of the air supply fan 5 is connected to the air supply port 4. Further, the axial flow fan includes but is not limited to a variable frequency fan.

[0118] In this way, when the exhaust fan 2 is running, a negative pressure can be formed in the exhaust air chamber 101, so that the air (such as the return air flow) entering other air chambers (such as the return air chamber 103) connected to the exhaust air chamber 101 is discharged through the exhaust port 16. Similarly, when the air supply fan 5 is running, a negative pressure can be formed in the air supply air chamber 102, so that the air (such as the fresh air flow) entering other air chambers (such as the fresh air chamber 104) connected to the air supply air chamber 102 is discharged through the air supply port 4, thereby performing ventilation.

[0119] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange device also includes a temperature control device 3 with a refrigerant cycle. The temperature control device 3 includes a first heat exchanger 301 and a second heat exchanger 302. The first heat exchanger 301 and the second heat exchanger 302 are both arranged in the air supply plenum 102, and the first heat exchanger 301 is located on the upstream side of the air path of the air supply plenum 102. Among them, the heat exchange device has a dehumidification mode with the first heat exchanger 301 as an evaporator and the second heat exchanger 302 as a condenser.

[0120] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the heat exchange area of ​​the first heat exchanger 301 is configured to be greater than or equal to the heat exchange area of ​​the second heat exchanger 302. The temperature control device 3 also includes a third heat exchanger 303, which is arranged in the exhaust air chamber 101, and the heat exchange area of ​​the third heat exchanger 303 is configured to be greater than the heat exchange area of ​​the second heat exchanger 302. In the dehumidification mode, the third heat exchanger 303 is used as a condenser.

[0121] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the first heat exchanger 301, the second heat exchanger 302 and the third heat exchanger 303 include but are not limited to plate heat exchangers. In detail, the first heat exchanger 301 and the second heat exchanger 302 are arranged in parallel and spaced apart, and the second heat exchanger 302 is closer to the air supply port 4 than the first heat exchanger 301. Since the air supply port 4 only discharges the air supply airflow to the second space, the first heat exchanger 301 can be regarded as being located on the upstream side of the second heat exchanger 302 along the airflow direction. Furthermore, the third heat exchanger 303 is arranged in the exhaust air chamber 101.

[0122] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the temperature control device 3 further includes a compressor 304 and a distribution component. The compressor 304 is configured to compress the refrigerant. The distribution component is arranged between the compressor 304 and the first heat exchanger 301, the second heat exchanger 302 and the third heat exchanger 303, and is configured to distribute the refrigerant between the first heat exchanger 301, the second heat exchanger 302 and the third heat exchanger 303. The compressor 304 is arranged in the exhaust air chamber 101.

[0123] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the temperature control device 3 also includes a compressor 304 and a distribution component, wherein the distribution component includes but is not limited to a pipeline connecting the compressor 304 with the heat exchanger, a pipeline connecting different heat exchangers, and a valve body provided for the pipeline (such as a first flow control valve 305, a second flow control valve 306 and a four-way reversing valve 307). In detail, the compressor 304 is arranged between the third heat exchanger 303 and the second partition 18 of the exhaust air chamber. Among them, when the heat exchange device is in the dehumidification mode, the third heat exchanger 303 is the same as the second heat exchanger 302, and both are used as condensers (the corresponding first heat exchanger 301 is used as an evaporator).

[0124] In such an embodiment, when the heat exchange device is in the dehumidification mode, the third heat exchanger 303 and the second heat exchanger 302 are both used as condensers, and the first heat exchanger 301 is used as an evaporator. That is, the first heat exchanger 301 is used to cool the airflow passing through the air supply chamber 102 to remove part of the water vapor in the airflow; the second heat exchanger 302 is located on the downstream side of the first heat exchanger 301, and is suitable for heating the airflow to prevent the air supply airflow discharged from the air supply port 4 from being too low in temperature, causing discomfort to the user.

[0125] Furthermore, the third heat exchanger 303 and the second heat exchanger 302 are also used as condensers, which can assist the second heat exchanger 302 in releasing the heat in the refrigerant. Among them, since the third heat exchanger 303 is located in the exhaust air chamber 101, the exhaust air flow is discharged to the first space (that is, not facing the user). Therefore, compared with the second heat exchanger 302, a larger heat exchange area can be configured (that is, the heat exchange area of ​​the third heat exchanger 303 is larger than the heat exchange area of ​​the second heat exchanger 302, such as the heat exchange area of ​​the third heat exchanger 303 can be configured to be the same as the heat exchange area of ​​the first heat exchanger 301, of course, it can also be different), so that the refrigerant is fully condensed. In addition, since the compressor 304 is also located in the exhaust air chamber 101, the exhaust air flow is also used to cool the compressor 304 to prevent it from overheating.

[0126] In some illustrative embodiments, the pipelines configured by the temperature control device 3 include a main circuit, in which a first flow control valve 305, a four-way reversing valve 307, a compressor 304, a first heat exchanger 301 and a third heat exchanger 303 are configured, wherein the compressor 304 is configured to compress the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure state, and the first heat exchanger 301 can be used as both an evaporator and a condenser; correspondingly, the third heat exchanger 303 is used as a condenser or an evaporator opposite to the first heat exchanger 301.

[0127] Furthermore, the pipeline configured by the temperature control device 3 is also provided with a branch, and the branch is provided with a second flow control valve 306 and a second heat exchanger 302. Based on the configuration of the above pipeline and valve body, the first flow control valve 305 is used to configure the refrigerant flow entering the first heat exchanger 301, the second flow control valve 306 is used to configure the refrigerant flow entering the second heat exchanger 302, and the four-way reversing valve 307 is located between the main road and the branch, and is used to change the flow direction of the refrigerant to adapt to different working modes of the heat exchange device, which will be specifically described in the following embodiments. Among them, the first flow control valve 305 and / or the second flow control valve 306 include but are not limited to the use of an expansion valve.

[0128] According to different usage scenarios, the heat exchange device has at least the following operation modes, including ventilation mode, heat exchange mode, internal circulation mode, mixed air mode, heating mode and dehumidification mode. Among them, the dehumidification mode can be further divided into the first dehumidification mode, the second dehumidification mode and the third dehumidification mode according to the different air paths of the airflow in the heat exchange device.

[0129] On this basis, in order to distinguish and explain the above modes, a detailed table of operating modes is given, as shown in Table 1 below:

[0130] Table 1 Operation mode details

[0131] First air valve Second air valve The third air valve Fourth air valve First bypass vent valve Second bypass ventilation valve Exhaust air valve Fresh air valve Temperature control device operating status Internal circulation mode Open Open Open Open Open Shutdown Shutdown Shutdown Stop running Hot swap mode Open Open Open Open Shutdown Shutdown Open Open Stop running Ventilation mode Shutdown Open Open Shutdown Shutdown Open Open Open Stop running Mixed air mode Open Open Open Open Open Shutdown Shutdown Open Stop running Heating mode Open Open Open Open Shutdown Shutdown Open Open Operation (heating with the first heat exchanger) First dehumidification mode Open Open Open Open Shutdown Shutdown Open Open Operation (first heat exchanger cooling) Second dehumidification mode Open Open Shutdown Shutdown Shutdown Shutdown Open Open Operation (first heat exchanger cooling) The third dehumidification mode Shutdown Open Open Shutdown Shutdown Open Open Open Operation (first heat exchanger cooling)

[0132] Figure 3 It is a schematic diagram of the wind path of the heat exchange device in the internal circulation mode according to an embodiment of the present disclosure.

[0133] According to the embodiments of the present disclosure, Figure 3 As shown, the heat exchange device has an internal circulation mode. When the heat exchange device is in the internal circulation mode, according to the airflow direction, the return air port 9, the return air chamber 103, the exhaust air chamber 101, the first bypass air valve 15, the fresh air chamber 104, the heat exchange unit 12, the supply air chamber 102 and the supply air port 4 are connected in sequence, so that the return air entering the heat exchange device from the second space flows through the supply air port 4 and returns to the second space.

[0134] The internal circulation mode can be understood as an operation mode in which the return airflow of the second space enters the heat exchange device through the return air port 9, and after the heat exchange device circulates, the supply airflow is output from the supply air port 4 and returns to the second space. The internal circulation mode can be regarded as an operation mode in which there is no fresh airflow input and the temperature control device 3 is in a stopped state. This mode includes but is not limited to being applied to the use scenarios in which the first space is overcooled, overheated, or the air quality is poor.

[0135] In the internal circulation mode, based on the heat exchange device of the above embodiment, the first air valve 13, the second air valve 10, the third air valve 19, the fourth air valve 20 and the first bypass air valve 15 of the heat exchange device are in an open state, and the second bypass air valve 8, the exhaust air valve and the fresh air valve are in a closed state. In addition, the compressor 304 in the temperature control device 3 is stopped so that the refrigerant does not circulate.

[0136] Based on the air path formed by the states of the above-mentioned air valves, the return air flow through the second space sequentially passes through the return air port 9, the heat exchange unit 12 (entering from the first air inlet surface 1202 and outputting from the second air outlet surface 1204), the exhaust air chamber 101, the first bypass air duct, the fresh air chamber 104, the heat exchange unit 12 (entering from the first air inlet surface 1201 and outputting from the first air outlet surface 1203), the supply air chamber 102 and the supply air port 4, forming the supply air flow returning to the second space.

[0137] In such an embodiment, in the internal circulation mode, the heat exchange device will neither cool nor heat the return air flow, nor will the return air flow exchange heat with the fresh air flow, so the supply air temperature in the second space can be considered to be roughly the same as the return air temperature. In addition, since the heat exchange device generates mechanical heat during operation, the supply air temperature may be slightly higher than the return air temperature, which can effectively prevent the above-mentioned condensation from occurring.

[0138] Figure 4 It is a schematic diagram of the air path of the heat exchange device in the heat exchange loop mode according to an embodiment of the present disclosure.

[0139] According to the embodiments of the present disclosure, Figure 4 As shown, the heat exchange device also has a heat exchange mode. When the heat exchange device is in the heat exchange mode, the fresh air chamber 104 is connected to the supply air chamber 102, the exhaust air chamber 101 is connected to the return air chamber 103, and the fresh air flow entering from the fresh air port 14 and the return air flow entering from the return air port 9 are heat exchanged in the heat exchange unit 12.

[0140] In the heat exchange mode, this mode can be understood as an operating mode in which the return air flow of the second space and the fresh air flow of the first space perform heat exchange in the heat exchange device. In this mode, the fresh air flow and the return air flow exchange heat through the heat exchange device to achieve energy saving and maintain indoor comfort. The heat exchange mode is suitable for use scenarios with good outdoor air quality and a small indoor and outdoor temperature difference (such as use scenarios with clear weather and high temperatures in spring and autumn).

[0141] In the heat exchange mode, based on the heat exchange device of the above embodiment, the first air valve 13, the second air valve 10, the third air valve 19, and the fourth air valve 20 are in an open state, the first bypass air valve 15 and the second bypass air valve 8 are in a closed state, and the exhaust air valve and the fresh air valve are in an open state. In addition, the compressor 304 in the temperature control device 3 is stopped, and the refrigerant does not circulate.

[0142] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air port 14, and exchanges heat with the return air flow through the heat exchange unit 12 (enters from the first air inlet surface 1201 and outputs from the first air outlet surface 1203); the return air flow passes through the return air port 9, the heat exchange unit 12 (enters from the first air inlet surface 1202 and outputs from the second air outlet surface 1204), the exhaust air chamber 101 in sequence, and finally is discharged to the first space through the exhaust air valve. In this way, the supply air flow after heat exchange can be sent to the second space through the supply air port 4.

[0143] In such an embodiment, in the heat exchange mode, the fresh air flow and the return air flow exchange heat in the heat exchange unit 12, so that the supply air temperature is close to the indoor temperature, thereby reducing energy consumption. At the same time, since the temperature control device 3 stops running, unnecessary energy consumption is avoided, and the appropriate exchange of indoor and outdoor air is guaranteed. In addition, since the compressor 304 does not run, it also has a good mute effect, and can prevent condensation caused by insufficient air temperature rise after dehumidification (i.e., dehumidification mode).

[0144] Figure 5 It is a schematic diagram of the wind path of the heat exchange device in the ventilation mode according to the embodiment of the present disclosure.

[0145] According to the embodiments of the present disclosure, Figure 5 As shown, the heat exchange device has a ventilation mode. When the heat exchange device is in the ventilation mode, the fresh air chamber 104, the heat exchange unit 12 and the supply air chamber 102 are connected in sequence according to the air flow direction, and the return air chamber 103 is connected to the exhaust air chamber 101 through the second bypass air valve 8. In which, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to adjust from the ventilation mode to the internal circulation mode, or, adjust from the ventilation mode to the heat exchange mode.

[0146] The ventilation mode can be understood as an operating mode in which the return air flow of the second space and the fresh air flow of the first space do not exchange heat. The ventilation mode is suitable for scenarios where indoor air quality needs to be improved or outdoor environmental conditions allow air exchange.

[0147] In the ventilation mode, based on the heat exchange device of the above embodiment, the second air valve 10, the third air valve 19, the second bypass air valve 8, the exhaust air valve and the fresh air valve are in the open state, while the first air valve 13 and the fourth air valve 20 are in the closed state. The first bypass air valve 15 is also in the closed state. The compressor 304 in the temperature control device 3 is stopped, and the refrigerant does not circulate.

[0148] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air port 14, passes through the heat exchange unit 12 (enters from the first air inlet surface 1201 and exits from the first air outlet surface 1203), and enters the supply air chamber 102. The return air flow of the second space enters the return air chamber 103 through the return air port 9, enters the exhaust air chamber 101 through the second bypass air duct, and enters the first space through the exhaust port 16.

[0149] In such an embodiment, in the ventilation mode, indoor and outdoor air are directly exchanged without heat recovery. Since the temperature control device 3 stops running, this mode does not involve cooling or heating and is suitable for occasions where only ventilation is required. This mode helps maintain the freshness of indoor air while avoiding unnecessary energy consumption.

[0150] However, since the fresh air flow and the return air flow basically do not exchange heat, if the temperature difference between the first space and the second space is large, condensation is likely to occur. Therefore, if the supply air temperature obtained by the above embodiment is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device should be adjusted from the ventilation mode to the above heat exchange mode or internal circulation mode through the control device to reduce the occurrence of condensation.

[0151] Figure 6 It is a schematic diagram of the wind path of the heat exchange device in the mixed air mode according to an embodiment of the present disclosure.

[0152] like Figure 6 As shown, the heat exchange device also has a mixed air mode. When the heat exchange device is in the mixed air mode, the return air port 9, the return air chamber 103, the exhaust air chamber 101, the first bypass air valve 15, the fresh air chamber 104, the heat exchange unit 12, the supply air chamber 102 and the supply air port 4 are connected in sequence according to the air flow direction, so that the return air entering the heat exchange device from the second space returns to the second space through the supply air port 4. At the same time, the fresh air port 14 also inputs a small amount of fresh air, which is mixed with the above air flow in the fresh air chamber 104.

[0153] In the mixed air mode, this mode can be understood as an operating mode in which the return air flow of the second space and the fresh air flow of the first space are partially mixed in the heat exchange device. In this mode, the fresh air flow and the return air flow are mixed in a certain proportion through the heat exchange device to achieve the purpose of ventilation and partial energy recovery. The mixed air mode is suitable for scenes where the outdoor air quality is good and it is desired to maintain indoor comfort to a certain extent.

[0154] In the mixed air mode, based on the heat exchange device of the above embodiment, the first air valve 13, the second air valve 10, the third air valve 19, the fourth air valve 20 and the first bypass air valve 15 are in an open state, while the second bypass air valve 8 and the exhaust air valve are in a closed state, and the fresh air valve is opened to introduce fresh air flow from the fresh air port 14. The compressor 304 in the temperature control device 3 is stopped, and the refrigerant does not circulate.

[0155] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air port 14. The return air flow sequentially passes through the return air port 9, the heat exchange unit 12 (enters from the first air inlet surface 1202 and outputs from the second air outlet surface 1204), the exhaust air chamber 101, and the first bypass air duct, and then mixes with the fresh air flow and passes through the heat exchange unit 12 (enters from the first air inlet surface 1201 and outputs from the first air outlet surface 1203), the supply air chamber 102 and the supply port 4 to form a mixed supply air flow that returns to the second space.

[0156] In such an embodiment, in the mixed air mode, the fresh air flow and the return air flow are mixed so that the supply air temperature is between the indoor and outdoor temperatures. Since the temperature control device 3 stops running, this mode does not involve cooling or heating, but the indoor air quality can be adjusted by mixing the fresh air and the return air. This mode helps to maintain the freshness of the indoor air, while achieving a certain amount of energy recovery and reducing energy consumption.

[0157] Figure 7 It is a schematic diagram of the wind path of the heat exchange device in the first dehumidification mode according to an embodiment of the present disclosure.

[0158] According to the embodiments of the present disclosure, Figure 7 As shown, the heat exchange device has a first dehumidification mode. When the heat exchange device is in the first dehumidification mode, the fresh air chamber 104 is connected to the supply air chamber 102, the exhaust air chamber 101 is connected to the return air chamber 103, and the fresh air flow entering from the fresh air port 14 and the return air flow entering from the return air port 9 are heat exchanged in the heat exchange unit 12. Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device 3 from operating, or to adjust to an internal circulation mode that stops the temperature control device 3 from operating, or to adjust to a heat exchange mode that stops the temperature control device 3.

[0159] In the first dehumidification mode, this mode can be understood as an operation mode in which the second space introduces fresh air flow into the first space and performs dehumidification in the heat exchange device to reduce the indoor humidity. In this mode, the fresh air flow is dehumidified by the first heat exchanger 301 (used as an evaporator), and the air in the second space is discharged through the exhaust port 16. The first dehumidification mode is suitable for use in spring and summer when the temperature is high and the humidity is high, and the outdoor air is relatively clean.

[0160] Fig.11 It is a schematic diagram of the piping of the temperature control device of the heat exchange equipment according to the embodiment of the present disclosure.

[0161] like Fig.11 As shown, in this mode, the refrigerant flow path is open, and the refrigerant flow path state is that the refrigerant evaporates and absorbs heat in the first heat exchanger 301 to transform into low-pressure steam, cooling the fresh air flow passing through. The low-pressure steam flows through the four-way reversing valve 307 and enters the compressor 304, where it is compressed into a high-temperature and high-pressure refrigerant gas, and then is discharged from the exhaust port of the compressor 304 and flows through the four-way reversing valve 307. After the refrigerant gas flows through the four-way reversing valve 307, a part of it flows to the third heat exchanger 303; the other part flows to the second heat exchanger 302. After the high-temperature and high-pressure refrigerant gas enters the third heat exchanger 303, it is cooled into a high-pressure liquid refrigerant. Similarly, after the high-temperature and high-pressure refrigerant gas enters the second heat exchanger 302, it is cooled into a high-pressure liquid refrigerant and enters the second flow control valve 306.

[0162] The first flow control valve 305 and the second flow control valve 306 of this embodiment include but are not limited to one-way valves, and are in a conducting state in the first dehumidification mode. The refrigerant passing through the second heat exchanger 302 and the second heat exchanger 302 is merged into the first flow control valve 305; after the refrigerant is throttled by the first flow control valve 305, it is converted into a low-temperature and low-pressure two-phase refrigerant and flows into the first heat exchanger 301, continuing the above-mentioned cycle process.

[0163] In the first dehumidification mode, the first air valve 13, the second air valve 10, the third air valve 19, and the fourth air valve 20 of the heat exchange device are in an open state, while the first bypass air valve 15 and the second bypass air valve 8 are in a closed state, and the exhaust air valve and the fresh air valve are opened to introduce fresh air flow and output exhaust air flow. The first heat exchanger 301 in the temperature control device 3 is used as an evaporator and is in an operating state to realize the dehumidification function.

[0164] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air valve and is dehumidified in the first heat exchanger 301 (used as an evaporator). At the same time, the humid air in the room is discharged through the exhaust air valve. After the treated fresh air flow passes through the heat exchange unit 12 (enters from the first air inlet surface 1201 and is output from the first air outlet surface 1203), it passes through the air supply chamber 102 and the air supply port 4 to form a dehumidified supply air flow and returns to the second space.

[0165] In such an embodiment, in the first dehumidification mode, the fresh air flow removes part of the water vapor in the first heat exchanger 301 (used as an evaporator), thereby reducing the humidity of the second space, and the dehumidified air flow is heated by the second heat exchanger 302 to prevent the user from feeling uncomfortable due to the low air supply temperature. As the compressor 304 in the temperature control device 3 runs, the refrigerant circulates in the system to achieve the dehumidification function. In this mode, the air supply temperature may be slightly reduced due to the action of the evaporator, but the main purpose is to reduce the indoor humidity. Such an operation can effectively improve the indoor comfort, but if the heat exchange area of ​​the second heat exchanger 302 is insufficient (or fails), it may cause the air supply temperature to decrease, which may easily lead to the occurrence of condensation. For this reason, if the air supply temperature obtained by the above embodiment is lower than the dew point temperature and lasts for a preset time, the heat exchange device should be stopped by the control device to stop the operation of the temperature control device 3, or the first dehumidification mode should be adjusted to the above heat exchange mode or internal circulation mode to reduce the occurrence of condensation.

[0166] Figure 8 It is a schematic diagram of the wind path of the heat exchange device in the second dehumidification mode according to an embodiment of the present disclosure.

[0167] According to the embodiments of the present disclosure, Figure 8As shown, the heat exchange device has a second dehumidification mode. When the heat exchange device is in the second dehumidification mode, the fresh air chamber 104 is connected to the exhaust air chamber 101, and the return air chamber 103 is connected to the supply air chamber 102. Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device 3 from operating, or to adjust to an internal circulation mode that stops the temperature control device 3 from operating, or to adjust to a heat exchange mode that stops the temperature control device 3. The compressor 304 of the temperature control device 3 temperature control device 3.

[0168] In the second dehumidification mode, this mode can be understood as the second space introducing return air flow through the return air port 9, and the return air flow passes through the supply air chamber 102 and then directly outputs the supply air flow from the supply air port 4. In this mode, the return air flow is dehumidified by the first heat exchanger 301 (used as an evaporator), so it can be regarded as another kind of internal circulation of the return air flow. At the same time, the fresh air flow passes through the fresh air chamber 104 and the exhaust air chamber 101 in sequence from the fresh air port 14, and passes through the third heat exchanger 303 (used as a condenser) in the exhaust air chamber 101 to condense the refrigerant. The second dehumidification mode is used in scenarios where the air quality of the first space is poor (such as high PM2.5), or the second space needs to be quickly dehumidified.

[0169] In the second dehumidification mode, the first air valve 13 and the second air valve 10 of the heat exchange device are in an open state, while the third air valve 19 and the fourth air valve 20 are closed, and the first bypass air valve 15 and the second bypass air valve 8 are also in a closed state. The exhaust air valve and the fresh air valve are opened to achieve fresh air introduction and exhaust. The first heat exchanger 301 in the temperature control device 3 is used as an evaporator and is in an operating state to achieve the dehumidification function.

[0170] Based on the air path formed by the states of the above air valves, the fresh air flows into the fresh air chamber 104 through the fresh air port 14, then into the exhaust air chamber 101, and is directly discharged from the exhaust port 16. At the same time, the air in the second space sequentially passes through the return air port 9, the return air chamber 103, the supply air chamber 102 and the supply air port 4 to form the supply air flow and return to the second space, thereby achieving dehumidification of the second space.

[0171] In such an embodiment, in the second dehumidification mode, the return air flow removes part of the water vapor in the first heat exchanger 301 (used as an evaporator), thereby reducing the humidity of the second space. As the compressor 304 in the temperature control device 3 operates, the refrigerant circulates in the system to achieve the dehumidification function.

[0172] In this mode, the supply air temperature may be slightly reduced due to the action of the evaporator, but the main purpose is to reduce the indoor humidity. Such operation can effectively improve indoor comfort, but if the heat exchange area of ​​the second heat exchanger 302 is insufficient (or fails), the supply air temperature may be reduced, which may easily lead to the occurrence of condensation. For this reason, if the supply air temperature obtained by the above embodiment is lower than the dew point temperature and lasts for a preset time, the heat exchange device should be stopped by the control device to stop the temperature control device 3, or the second dehumidification mode should be adjusted to the above heat exchange mode or internal circulation mode to reduce the occurrence of condensation.

[0173] Fig. 9 It is a schematic diagram of the wind path of the heat exchange device in the third dehumidification mode according to an embodiment of the present disclosure.

[0174] According to the embodiments of the present disclosure, Fig. 9 As shown, the heat exchange device has a third dehumidification mode. When the heat exchange device is in the third dehumidification mode, the fresh air chamber 104 is connected to the supply air chamber 102, and the return air chamber 103 is connected to the exhaust air chamber 101 through the second bypass air valve 8. Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to adjust from the third dehumidification mode to the internal circulation mode in which the temperature control device 3 stops operating, or to the heat exchange mode in which the temperature control device 3 stops operating. .

[0175] In the third dehumidification mode, this mode can be understood as an operation mode in which the second space introduces fresh air flow from the first space and performs dehumidification treatment in the first heat exchanger 301 (used as an evaporator) to reduce the indoor humidity. In this mode, the fresh air flow is dehumidified through the first heat exchanger 301 (used as an evaporator), and the return air flow discharges the humid air in the second space through the second bypass vent valve 8, the exhaust air chamber 101 and the exhaust port 16. The third dehumidification mode is similar to the first dehumidification mode and is suitable for use in spring and summer when the temperature is high and the humidity is high, and the outdoor air is relatively clean.

[0176] In the third dehumidification mode, the first air valve 13 of the heat exchange device is closed, the second air valve 10 and the third air valve 19 are opened, the fourth air valve 20 is closed, the first bypass air valve 15 is closed, and the second bypass air valve 8 is opened to achieve the introduction of fresh air flow and the discharge of return air flow. The first heat exchanger 301 in the temperature control device 3 is used as an evaporator and is in operation to achieve the dehumidification function.

[0177] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air valve and is dehumidified in the first heat exchanger 301 (used as an evaporator). At the same time, the humid air in the room is discharged through the exhaust air valve and the second bypass air valve 8. After the treated fresh air flow passes through the third air valve 19 of the heat exchange unit 12, it passes through the air supply chamber 102 and the air supply port 4 to form a dehumidified supply air flow and returns to the second space.

[0178] In such an embodiment, in the third dehumidification mode, the fresh air flow removes part of the water vapor in the first heat exchanger 301 (used as an evaporator), thereby reducing the humidity of the second space. As the compressor 304 in the temperature control device 3 runs, the refrigerant circulates in the system to achieve the dehumidification function. In this mode, the supply air temperature may be slightly reduced due to the action of the evaporator, but the main purpose is to reduce the indoor humidity. Such an operation can effectively improve indoor comfort, but if the heat exchange area of ​​the second heat exchanger 302 is insufficient (or fails), it may cause the supply air temperature to decrease, which may easily lead to condensation. For this reason, if the supply air temperature obtained by the above embodiment is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device should be adjusted from the third dehumidification mode to the ventilation mode through the control device.

[0179] In the ventilation mode, indoor and outdoor air are directly exchanged without heat recovery. Since the temperature control device 3 stops running, this mode does not involve cooling or heating and is suitable for occasions where only ventilation is required. This mode helps maintain the freshness of indoor air while avoiding unnecessary energy consumption.

[0180] However, since the fresh air flow and the return air flow basically do not exchange heat, if the temperature difference between the first space and the second space is large, condensation is likely to occur. Therefore, if the supply air temperature obtained by the above embodiment is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device should be adjusted from the ventilation mode to the above heat exchange mode or internal circulation mode through the control device to reduce the occurrence of condensation.

[0181] Fig.10 It is a schematic diagram of the wind path of the heat exchange device in the heating mode according to an embodiment of the present disclosure.

[0182] like Fig.10 As shown, the heat exchange device also has a heating mode. The heating mode is suitable for operation in the use scenario of low temperature and severe cold in winter (such as -10℃ and below).

[0183] In the heating mode, this mode can be understood as an operation mode in which the second space heats the fresh air flow introduced from the first space through the heat exchange unit 12 and the first heat exchanger 301 to maintain or increase the indoor temperature. In this mode, the fresh air flow is heated in sequence by the heat exchange unit 12 and the first heat exchanger 301 (used as a condenser), thereby increasing the supply air temperature of the supply air flow entering the second space. The heating mode is suitable for use scenarios where the indoor temperature needs to be increased in winter when the temperature is low.

[0184] In the heating mode, the first air valve 13, the second air valve 10, the third air valve 19, and the fourth air valve 20 of the heat exchange device are in an open state, while the first bypass air valve 15 and the second bypass air valve 8 are in a closed state, and the exhaust air valve and the fresh air valve are opened to realize the introduction of fresh air flow and output the exhaust air flow. The first heat exchanger 301 in the temperature control device 3 is used as a condenser, and the third heat exchanger 303 is used as an evaporator, and is in an operating state to realize the heating function.

[0185] In this mode, the refrigerant circulation flow path is in the state that the refrigerant evaporates and absorbs heat in the third heat exchanger 303 to be transformed into low-pressure steam, flows through the four-way reversing valve 307 to enter the compressor 304, is compressed into high-temperature and high-pressure refrigerant gas, and then flows through the four-way reversing valve 307 to enter the first heat exchanger 301. The high-temperature and high-pressure refrigerant gas condenses and dissipates heat in the first heat exchanger 301, heats the fresh air flow passing through, and the high-temperature and high-pressure refrigerant gas is transformed into a low-temperature and high-pressure refrigerant liquid. After being throttled by the first flow control valve 305, the low-temperature and high-pressure refrigerant liquid is transformed into a low-temperature and low-pressure two-phase refrigerant and flows into the third heat exchanger 303, continuing the above cycle. At this time, since the second flow control valve 306 is closed, the refrigerant will not flow through the second heat exchanger 302.

[0186] Based on the air path formed by the states of the above-mentioned air valves, the fresh air flow enters the fresh air chamber 104 through the fresh air port 14, and performs heat exchange with the return air flow through the heat exchange unit 12, thereby being preheated. After that, it is heated by the first heat exchanger 301 of the supply air chamber 102. The treated hot air flow passes through the supply air chamber 102 and the air port 4 to form a heated supply air flow and returns to the second space.

[0187] In such an embodiment, in the heating mode, the fresh air flow absorbs heat under the action of the heat exchange unit 12 and the first heat exchanger 301, thereby raising the indoor temperature. In this mode, the supply air temperature will increase due to the action of the condenser, the main purpose of which is to increase the indoor temperature. Such an operation can effectively improve the indoor comfort. Due to the low temperature condition of the first space, there is less water vapor in the air, and because the temperature of the heated supply air flow is high, condensation is not easy to occur.

[0188] Fig.12is a flow chart of a method for controlling a heat exchange device according to an embodiment of the present disclosure.

[0189] Based on the overall inventive concept, such as Fig.12 As shown, the present disclosure further provides a control method based on a heat exchange device, comprising:

[0190] Step S210: obtaining the air inlet temperature of the fresh air outlet of the heat exchange device, and when the air inlet temperature is higher than a preset temperature, calculating the dew point temperature of the second space where the heat exchange device is located;

[0191] Step S220: Obtain the air supply temperature of the air supply port of the heat exchange device, and compare the air supply temperature with the dew point temperature.

[0192] Based on the same inventive concept, in the control method for the heat exchange device, the detection device detects the air inlet temperature of the fresh air outlet, and when the air inlet temperature is higher than the preset temperature, the control device further calculates the dew point temperature of the second space. On this basis, the detection device also detects the air supply temperature of the air supply outlet, and compares the air supply temperature with the dew point temperature.

[0193] That is to say, compared with the prior art, the heat exchange device is configured to judge the condensation condition not only by the static preset temperature, but also by the dynamic dew point temperature of the second space, so as to improve the accuracy of judging whether condensation is likely to occur. On this basis, since the temperature of the fresh air may change when passing through the heat exchange device, the heat exchange device uses the method of comparing the supply air temperature with the dew point temperature, which is also conducive to further improving the accuracy of the judgment.

[0194] According to an embodiment of the present disclosure, the control method further includes:

[0195] Step S230: When the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the supply air temperature of the heat exchange device is increased.

[0196] According to an embodiment of the present disclosure, step S230: when the supply air temperature is lower than the dew point temperature and lasts for a preset time, increasing the supply air temperature of the heat exchange device includes:

[0197] Step S231: When the heat exchange device is in the ventilation mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is adjusted to the internal circulation mode, or to the heat exchange mode.

[0198] According to an embodiment of the present disclosure, step S230: when the supply air temperature is lower than the dew point temperature and lasts for a preset time, increasing the supply air temperature of the heat exchange device includes:

[0199] Step S232: When the heat exchange device is in the dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is adjusted to the internal circulation mode in which the temperature control device stops operating, or to the heat exchange mode in which the temperature control device stops operating.

[0200] According to an embodiment of the present disclosure, step S220: obtaining the air supply temperature of the air supply port of the heat exchange device and comparing the air supply temperature with the dew point temperature includes:

[0201] Step S221: Calculate the dew point temperature according to the return air temperature and return air humidity of the heat exchange device.

[0202] Step S210: when the heating unit 104 of the air supply device is in operation, the temperature measuring unit 105 of the air supply device acquires the return air temperature of the air supply device;

[0203] Step S220: When the return air temperature reaches a first temperature threshold, the air guide portion 106 of the air supply device adjusts the air outlet direction toward a first direction away from the return air outlet 102 of the air supply device.

[0204] Based on the overall inventive concept of the air supply device 100, the temperature measuring unit 105 of the air supply device 100 is used to detect the return air temperature of the air supply device. When the return air temperature reaches a first temperature threshold, the air guide unit 106 is controlled to adjust the air outlet direction of the air supply device to a first direction away from the return air port 102, so as to reduce the amount of hot air discharged from the air outlet 103 and sucked back into the return air port 102, thereby preventing the temperature measuring unit 105 from misjudging the return air temperature, thereby shortening the heating time of the air supply device 100 and improving the user's comfort.

[0205] Fig.13 Yes Fig.12 A flow chart of an exemplary embodiment of a control method is shown.

[0206] According to an embodiment of the present disclosure, the control method further includes:

[0207] Step S310: running in initial mode;

[0208] In step S310, the heat exchange device operates in an initial mode, which includes but is not limited to one of the above-mentioned operating modes.

[0209] Step S320: determining whether the air inlet temperature reaches a preset temperature;

[0210] Step S321: if the air inlet temperature is lower than the preset temperature, the process proceeds to step 321 and switches to the heat exchange mode;

[0211] In step S320 and step S321, if the inlet air temperature is greater than the preset temperature (including but not limited to 12°C) during the operation of the heat exchange device, it means that the inlet temperature of the fresh air flow entering from the fresh air inlet is too low. Therefore, the heat exchange mode can be directly entered to prevent condensation / frost in the heat exchange unit.

[0212] Step S330: If the inlet air temperature is greater than or equal to the preset temperature, proceed to step S330 to calculate the dew point temperature;

[0213] In step S330, the method for calculating the dew point temperature has been described in the above-mentioned embodiment of the heat exchange device, and therefore, it will not be repeated here.

[0214] Step S340: determining whether the inlet air temperature reaches the dew point temperature;

[0215] Step S341: if the air inlet temperature is greater than the dew point temperature, then enter step 341 and maintain the current operation mode;

[0216] In step S340 and step S341, if the air inlet temperature is maintained above the dew point temperature during the operation of the heat exchange device, it can be considered that condensation is not likely to occur in this operation mode, and therefore, the current operation mode can be maintained;

[0217] Step S350: If the air inlet temperature is less than or equal to the dew point temperature, the process proceeds to step S350 to determine whether the operation time of the heat exchange device reaches a first preset time (e.g., 5 minutes);

[0218] In step S350, the first operating time is set to prevent the temperature fluctuation caused by the cooling and heating process of the heat exchange device from affecting its judgment, thereby avoiding frequent switching of the operating mode.

[0219] Step S360: determining whether the heat exchange device is in a dehumidification mode;

[0220] Step S361: if the heat exchange device is not in the dehumidification mode, then proceed to step S361 to determine whether the heat exchange device is in the ventilation mode;

[0221] In step S360 and step S361, since the dehumidification mode and the ventilation mode are operating modes where condensation is more likely to occur, a judgment needs to be made.

[0222] Step S362: If the heat exchange device is in the ventilation mode, then enter step S362 to switch the operation mode to the heat exchange mode;

[0223] In step S362, the details of the ventilation mode and the internal circulation mode have been described in the above-mentioned embodiments of the heat exchange device, so they will not be repeated here.

[0224] Step S363: if the heat exchange device is not in the ventilation mode, then enter step S363 and maintain the current operation mode;

[0225] Step S364: operating in the heat exchange mode until the difference between the supply air temperature and the dew point temperature is greater than or equal to the preset temperature difference;

[0226] In step S364, the preset temperature difference includes but is not limited to being configured as 2°C. Switching the heat exchange device from the ventilation mode to the heat exchange mode can reduce the entry of fresh air flow. Since the supply air flow and the exhaust air flow exchange heat and moisture at the heat exchange unit, the risk of condensation caused by the temperature difference between indoor and outdoor is avoided. As the supply air temperature increases, it gradually exceeds the dew point temperature and reaches the preset temperature difference (i.e., the supply air temperature ≥ dew point temperature + 2°C). At this time, it can be regarded as being difficult to produce condensation due to the increase in the supply air temperature. For this reason, it can be returned to the initial operation mode (such as ventilation). Of course, in order to prevent condensation, the ventilation mode can also be switched to the internal circulation mode.

[0227] Step S370: If the heat exchange device is in the dehumidification mode, then proceed to step S370, stop the temperature control device, and proceed to step S380;

[0228] In step S370, the reason why the heat exchange device generates condensation in the dehumidification mode is mainly due to the insufficient heat exchange area and / or failure of the condenser (such as the second heat exchanger) located downstream of the evaporator (such as the first heat exchanger). Therefore, stopping the operation of the temperature control device (such as stopping the compressor) can effectively alleviate the occurrence of condensation. Of course, it can also be further adjusted to the internal circulation mode or the heat exchange mode.

[0229] In step S370, the details of the dehumidification mode and the heat exchange mode have been described in the above-mentioned embodiments of the heat exchange device, so they will not be repeated here.

[0230] Step S380: Determine whether the air supply device is in the ventilation mode, if it is in the ventilation mode, proceed to step S362, if not in the ventilation mode, proceed to step S390;

[0231] In step S380, since the ventilation mode and the third dehumidification mode have the same air path, if the third dehumidification mode is adjusted to the ventilation mode, condensation may still occur. Therefore, it is necessary to further determine whether the heat exchange device is in the ventilation mode.

[0232] Step S390: if it is determined that the operation time of the heat exchange device reaches a second preset time, the heat exchange device is returned from the internal circulation mode to the initial operation mode.

[0233] In step S390, the second preset duration includes but is not limited to being configured as 30 minutes. When condensation protection is performed, the temperature control device of the heat exchange device is stopped, or the dehumidification mode is switched to the internal circulation mode (the temperature control device is also stopped), so as to avoid the temperature of the fresh air flow from continuing to drop during the dehumidification process, thereby reducing the risk of condensation. After the operation time of the heat exchange device reaches the second preset duration, since the temperature control device has stopped operating for a long time, the temperatures of the evaporator and the condenser are basically balanced. At this time, even if the dehumidification mode is returned to operate again, condensation is not likely to occur for a long time.

[0234] So far, the embodiments of the present disclosure have been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the present disclosure.

[0235] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element are not limited to the various specific structures and shapes mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0236] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A heat exchange device, characterized in that: include: A shell, the shell having a first end and a second end facing away from each other, the first end facing the first space and having a fresh air inlet and an exhaust air outlet, and the second end facing the second space and having an air supply inlet and an air return inlet; A detection device configured to obtain the air inlet temperature of the fresh air outlet; as well as a control device configured to calculate the dew point temperature of the second space when the inlet air temperature is higher than a preset temperature; Wherein, the detection device is further configured to obtain the air supply temperature of the air supply port, and the control device is further configured to compare the air supply temperature and the dew point temperature.

2. The heat exchange device according to claim 1, characterized in that: The detection device is further configured to further obtain the return air temperature and return air humidity of the return air outlet when the inlet air temperature is higher than a preset temperature; The control device is further configured to calculate the dew point temperature of the second space according to the return air temperature and the return air humidity.

3. The heat exchange device according to claim 2, characterized in that: The detection device comprises: A first sensor is configured to obtain the inlet air temperature; A second sensor is configured to obtain the return air temperature and the return air humidity; and The third sensor is configured to obtain the supply air temperature.

4. The heat exchange device according to claim 1, characterized in that: When the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the control device is further configured to increase the supply air temperature of the heat exchange device.

5. The heat exchange device according to claim 4, characterized in that: Also includes: A first partition plate is disposed between the first end and the second end to divide the interior of the housing into a first area and a second area, the exhaust port and the air supply port are located in the first area, and the fresh air port and the return air port are located in the second area; A second partition plate is disposed at a portion of the first area between the exhaust port and the supply port to separate the first area into an exhaust air chamber and an supply air chamber; as well as The heat exchange unit is arranged in a portion of the second area between the fresh air inlet and the return air inlet to separate the second area into a fresh air chamber and a return air chamber.

6. The heat exchange device according to claim 5, characterized in that: It also includes a first bypass air valve, which is arranged between the fresh air chamber and the exhaust air chamber, and has an open state that connects the fresh air chamber and the exhaust air chamber, and a closed state that isolates the fresh air chamber and the exhaust air chamber.

7. The heat exchange device according to claim 6, characterized in that: The heat exchange device has an internal circulation mode; When the heat exchange device is in the internal circulation mode, the return air port, the return air chamber, the exhaust air chamber, the first bypass air valve, the fresh air chamber, the heat exchange unit, the supply air chamber and the supply air port are connected in sequence according to the air flow direction, so that the return air entering the heat exchange device from the second space returns to the second space through the supply air port.

8. The heat exchange device according to claim 7, characterized in that: It also includes a second bypass air valve, which is arranged on the first partition plate and has an open state for connecting the return air chamber and the exhaust air chamber, and a closed state for isolating the return air chamber and the exhaust air chamber.

9. The heat exchange device according to claim 8, characterized in that: The heat exchange device also has a heat exchange mode; When the heat exchange device is in the heat exchange mode, the fresh air chamber is connected to the supply air chamber, the exhaust air chamber is connected to the return air chamber, and the fresh air flow entering from the fresh air port and the return air flow entering from the return air port perform heat exchange in the heat exchange unit.

10. The heat exchange device according to claim 9, characterized in that: The heat exchange device also has a ventilation mode; When the heat exchange device is in the ventilation mode, the fresh air chamber, the heat exchange unit and the supply air chamber are connected in sequence according to the air flow direction, and the return air chamber is connected to the exhaust air chamber through the second bypass air valve; Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to be adjusted from the ventilation mode to the internal circulation mode, or from the ventilation mode to the heat exchange mode.

11. The heat exchange device according to claim 10, characterized in that: Also included is a temperature control device with a refrigerant cycle, the temperature control device comprising: A first heat exchanger and a second heat exchanger, wherein the first heat exchanger and the second heat exchanger are both disposed in the air supply plenum, and the first heat exchanger is located on an upstream side of an air path of the air supply plenum; The heat exchange device has a dehumidification mode in which the first heat exchanger is used as an evaporator and the second heat exchanger is used as a condenser.

12. The heat exchange device according to claim 11, characterized in that: The heat exchange area of ​​the first heat exchanger is configured to be greater than or equal to the heat exchange area of ​​the second heat exchanger; The temperature control device also includes: A third heat exchanger is disposed in the exhaust air chamber, and a heat exchange area of ​​the third heat exchanger is configured to be larger than a heat exchange area of ​​the second heat exchanger; Wherein, in the dehumidification mode, the third heat exchanger is used as a condenser.

13. The heat exchange device according to claim 12, characterized in that: The temperature control device also includes: a compressor configured to compress the refrigerant; and a distribution assembly, disposed between the compressor and the first heat exchanger, the second heat exchanger, and the third heat exchanger, and configured to distribute the refrigerant among the first heat exchanger, the second heat exchanger, and the third heat exchanger; Wherein, the compressor is arranged in the exhaust air chamber.

14. The heat exchange device according to any one of claims 11 to 13, characterized in that: The heat exchange device has a first dehumidification mode; When the heat exchange device is in the first dehumidification mode, the fresh air chamber is connected to the supply air chamber, the exhaust air chamber is connected to the return air chamber, and the fresh air flow entering from the fresh air port and the return air flow entering from the return air port perform heat exchange in the heat exchange unit; Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from operating, or to adjust to the internal circulation mode that stops the temperature control device from operating, or to adjust to the heat exchange mode that stops the temperature control device.

15. The heat exchange device according to any one of claims 11 to 13, characterized in that: The heat exchange device has a second dehumidification mode; When the heat exchange device is in the second dehumidification mode, the fresh air chamber is connected to the exhaust air chamber, and the return air chamber is connected to the supply air chamber; Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from operating, or to adjust to the internal circulation mode that stops the temperature control device from operating, or to adjust to the heat exchange mode that stops the temperature control device.

16. The heat exchange device according to any one of claims 11 to 13, characterized in that: The heat exchange device has a third dehumidification mode; When the heat exchange device is in the third dehumidification mode, the fresh air chamber is connected to the supply air chamber, and the return air chamber is connected to the exhaust air chamber via the second bypass air valve; Wherein, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to be adjusted from the third dehumidification mode to the internal circulation mode in which the temperature control device stops operating, or to the heat exchange mode in which the temperature control device stops operating.

17. The heat exchange device according to claim 5, characterized in that: The heat exchange unit comprises an air inlet side for air intake and an air outlet side for air outlet, wherein the air inlet side and the air outlet side are arranged in a vertical direction; The heat exchange device further includes a third partition plate which is arranged horizontally between the air outlet side and the air inlet side so as to isolate the air outlet side from the air inlet side.

18. The heat exchange device according to claim 6, characterized in that: The first partition plate and the first end are spaced apart; The heat exchange device further comprises a fourth partition plate arranged vertically, wherein the fourth partition plate is arranged at an end portion of the first partition plate facing the first end; A first bypass air passage is defined between the fourth partition plate and the inner wall of the first end, and the first bypass air valve is disposed in the first bypass air passage.

19. The heat exchange device according to claim 8, characterized in that Also included is a fifth partition plate arranged horizontally, the fifth partition plate being arranged in the air supply plenum to separate the air supply plenum into a first portion located at the top and a second portion located below the first portion; A second bypass air duct is defined between the first partition, the second portion, the second partition, and an inner wall facing the shell, and the second bypass air valve is disposed at a position of the first partition facing the second bypass air duct.

20. The heat exchange device according to claim 17, characterized in that The heat exchange unit has six sides; The upper side surface and the lower side surface facing each other are connected to the shell, the first air inlet surface and the second air inlet surface adjacent to the lower side surface are used as the air inlet side, and the first air outlet surface and the second air outlet surface adjacent to the upper side surface are used as the air outlet side; The first air inlet surface and the first air outlet surface are connected via the internal space of the heat exchange unit, and the second air inlet surface and the second air outlet surface are connected via the internal space of the heat exchange unit.

21. The heat exchange device according to claim 20, characterized in that The first air inlet surface faces the fresh air outlet, and the first air outlet surface faces the return air outlet; The second air inlet surface faces the return air outlet, and the second air outlet surface faces the fresh air outlet.

22. The heat exchange device according to claim 20 or 21, characterized in that: A first air valve is disposed on the upper portion of the third partition plate and facing the second air outlet surface; A second air valve is disposed on the upper portion of the third partition plate and facing the first air outlet surface; A third air valve is disposed at a lower portion of the third partition plate and facing the first air inlet surface; A fourth air valve is arranged at a lower portion of the third partition plate and facing the second air inlet surface.

23. The heat exchange device according to claim 19, characterized in that Also includes: An exhaust fan, arranged in the exhaust air chamber; as well as An air supply fan is arranged in the first part of the air supply chamber.

24. A control method based on the heat exchange device according to any one of claims 1 to 23, characterized in that: include: Acquire the air inlet temperature of the fresh air outlet of the heat exchange device, and when the air inlet temperature is higher than a preset temperature, calculate the dew point temperature of the second space where the heat exchange device is located; The air supply temperature of the air supply port of the heat exchange device is obtained, and the air supply temperature is compared with the dew point temperature.

25. The control method according to claim 24, characterized in that: The calculating the dew point temperature of the second space where the heat exchange device is located includes: The dew point temperature is calculated based on the return air temperature and return air humidity of the heat exchange device.

26. The control method according to claim 24 or 25, characterized in that: Also includes: When the supply air temperature is lower than the dew point temperature and remains at that temperature for a preset period of time, the supply air temperature of the heat exchange device is increased.

27. The control method according to claim 26, characterized in that: The step of increasing the supply air temperature of the heat exchange device when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time includes: When the heat exchange device is in the ventilation mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is adjusted to the internal circulation mode, or to the heat exchange mode.

28. The control method according to claim 26, characterized in that: The step of increasing the supply air temperature of the heat exchange device when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time includes: When the heat exchange device is in the first dehumidification mode, when the air supply temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from operating, or to adjust to the internal circulation mode in which the temperature control device stops operating, or to adjust to the heat exchange mode in which the temperature control device stops operating; And / or, when the heat exchange device is in the second dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is configured to stop the temperature control device from running, or to adjust to the internal circulation mode in which the temperature control device stops running, or to adjust to the heat exchange mode in which the temperature control device stops running.

29. The control method according to claim 26, characterized in that: The step of increasing the supply air temperature of the heat exchange device when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time includes: When the heat exchange device is in the third dehumidification mode, when the supply air temperature is lower than the dew point temperature and lasts for a preset period of time, the heat exchange device is adjusted to an internal circulation mode in which the temperature control device stops operating, or adjusted to a heat exchange mode in which the temperature control device stops operating.

30. The control method according to claim 24 or 25, characterized in that: Also includes: The inlet air temperature of the fresh air outlet of the heat exchange device is obtained, and when the inlet air temperature is lower than a preset temperature, the heat exchange device is adjusted to an internal circulation mode, or to a heat exchange mode.

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