Air conditioning device

Abstract

An air conditioning device, comprising a heat exchange core, a primary side air duct, and a secondary side air duct, wherein the primary side air duct and the secondary side air duct intersect at the heat exchange core and can exchange heat, and the secondary side air duct sequentially passes through a secondary side air inlet, a secondary side channel of the heat exchange core, a condenser, and a secondary side air outlet; and further comprising an air guide channel, wherein an inlet end of the air guide channel is communicated with an air outlet side of the condenser so as to optionally guide air of the air outlet side of the condenser, and an outlet end of the air guide channel is communicated with an inlet side of the secondary side channel. The air guide channel is additionally provided on the air outlet side of the condenser, so that air on an air outlet side of the heat exchange core can be guided into the secondary side channel by means of the air guide channel, so as to prevent the temperature of air in the secondary side channel from being too low, thus preventing air in the primary side air duct from exchanging excessive heat in the heat exchange core. Thus, the existing problem of air conditioning devices having difficulty controlling the temperature of primary side air when the temperature of outdoor air is low can be effectively solved.

Description

Air conditioning equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 3, 2023, with application number 202311459638.7 and invention name “A Kind of Air Conditioning Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of air conditioning, and more particularly to an air conditioning device. Background Art

[0003] In the field of indirect evaporative cooling unit equipment for data centers, an indirect evaporative cooling unit includes a heat exchange core, an evaporator, a water receiving tray, a spray device, a bypass air valve, etc.

[0004] The inventors discovered through long-term practice that in cold weather, indirect evaporative cooling units rely solely on core heat exchange. When this occurs, the secondary air inlet temperature is too low. Even if the secondary fan is maintained at its lowest speed, the core heat exchange is still excessive, resulting in excessively low supply air temperatures, impacting the operation of the unit's equipment. Furthermore, when the secondary air inlet temperature is lower than the primary air's dew point, continuous dehumidification of the primary air will occur, causing low humidity in the equipment room and potentially generating static electricity.

[0005] In summary, how to effectively solve the problem that current air conditioning equipment is difficult to control the temperature of the primary side air body when the outdoor air temperature is low is a problem that technicians in this field urgently need to solve.

[0006] Summary of the Invention

[0007] In view of this, an object of the present invention is to provide an air-conditioning device that can effectively improve the problem that current air-conditioning devices have difficulty in controlling the temperature of the primary side air body when the outdoor wind temperature is low.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] An air-conditioning device comprises a heat exchange core, a primary side air duct and a secondary side air duct, wherein the primary side air duct and the secondary side air duct intersect at the heat exchange core and enable the air bodies in the primary side air duct and the secondary side air duct to exchange heat, and the secondary side air duct passes through the secondary side air inlet, the secondary side channel of the heat exchange core and the secondary side air outlet in sequence, and also comprises an air guide channel, the inlet end of the air guide channel is connected to the air outlet side of the secondary side channel to optionally introduce the air body on the air outlet side of the secondary side channel, and the outlet end of the air guide channel is connected to the inlet side of the secondary side channel.

[0010] During use, in cold seasons, the compressor of the unit does not work. At this time, it is necessary to introduce outdoor air to cool and / or dehumidify the indoor air. When the outdoor air temperature is too low, especially when the secondary side air inlet temperature is too low, the air guide channel can be opened to introduce the air on the air outlet side of the heat exchange core, and then the air on the air outlet side of the heat exchange core can enter the secondary side channel of the heat exchange core to achieve circulation. Because the internal channel of the heat exchange core absorbs heat from the indoor air, the temperature of the air at the secondary side air outlet is relatively high, which can again avoid the air temperature entering the secondary side channel being too low. In the above-mentioned air-conditioning equipment, an air guide channel is added to the air outlet side of the condenser, so that the air on the air outlet side of the evaporator can be introduced into the secondary side channel through the air guide channel to avoid the air temperature in the secondary side channel being too low, thereby avoiding the air in the primary side duct from exchanging too much heat in the heat exchange core, and increasing the secondary side air inlet temperature of the core, significantly reducing the dehumidification amount of the primary side air inlet, and reducing the impact on the humidity of the machine room. In summary, the air-conditioning device can effectively solve the problem that the current air-conditioning device is difficult to control the temperature of the primary side air body when the outdoor wind temperature is low.

[0011] In some technical solutions, the inlet end of the air guide channel is connected to the cavity between the secondary air outlet and the air outlet side of the secondary channel; the air guide channel is provided with an air guide valve, and the secondary air outlet is provided with a secondary exhaust valve.

[0012] In some technical solutions, a condenser and a secondary side fan are also included. The condenser is arranged in the cavity between the secondary side air outlet and the air outlet side of the secondary side channel, and the secondary side fan is arranged between the condenser and the secondary side air outlet. The inlet end of the air guide channel is connected to the air cavity between the secondary side air outlet and the secondary side fan outlet.

[0013] In some technical solutions, the secondary air inlet is provided with a secondary filter, and the outlet end of the air guide channel is connected between the secondary air inlet and the inlet side of the secondary channel.

[0014] In some technical solutions, a box shell is included, at least one of the secondary air inlet and the secondary air outlet is an opening opened on the box shell, and the air guide channel is arranged in the box shell.

[0015] In some technical solutions, the primary side air duct passes through the primary side air inlet, the primary side channel of the heat exchange core, the evaporator and the primary side fan in sequence, and the evaporator and the condenser are located in the same mechanical refrigeration system.

[0016] In some technical solutions, the box shell has a square cavity, the middle part of the square cavity is provided with the heat exchange core, the square cavity forms a primary side air inlet cavity connected to the primary side air inlet on one side of the upper part of the heat exchange core, and forms a heating cavity with the condenser on the other side, the square cavity forms a liquid collection cavity and a primary side air outlet cavity arranged up and down on one side of the lower part of the heat exchange core, and forms a cooling cavity for the evaporator on the other side; a secondary side air inlet cavity is arranged on the side of the liquid collection cavity away from the cooling cavity, and the two are connected.

[0017] In some technical solutions, a secondary air outlet cavity is provided between the upper side of the square cavity and the inner upper wall of the box shell. The secondary air outlet cavity is located at the upper part of the heating cavity, and the two are connected through a ventilation opening that passes through the upper cavity wall of the square cavity; the secondary side fan is installed in the secondary air outlet cavity and connected to the ventilation opening.

[0018] In some technical solutions, a secondary air outlet is provided on the upper cavity wall of the secondary air outlet cavity, and an opening provided with the air guide valve is opened on the side of the secondary air outlet cavity close to the air inlet cavity to connect the air guide channel.

[0019] In some technical solutions, the air guide channel extends laterally away from the secondary air outlet cavity, and then extends downward at the corner of the square cavity to the secondary air inlet cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] FIG1 is a schematic structural diagram of an air-conditioning device provided in an embodiment of the present invention;

[0022] FIG2 is a schematic diagram of the air duct flow structure of the countercurrent heat exchange core provided by an embodiment of the present invention.

[0023] The following are marked in the accompanying drawings:

[0024] Heat exchange core 1, primary air duct 2, secondary air duct 3, secondary air inlet 4, condenser 5, secondary air outlet 6, air guide channel 7, air guide valve 8, secondary exhaust valve 9, secondary fan 10, secondary filter 11, box shell 12, primary air inlet 13, evaporator 14, primary fan 15, primary air inlet chamber 16, heating chamber 17, liquid collection chamber 18, primary air outlet chamber 19, cooling chamber 20, secondary air inlet chamber 21, secondary air outlet chamber 22, inlet section 41, middle section 42, outlet section 43. DETAILED DESCRIPTION

[0025] The embodiment of the present invention discloses an air-conditioning device, which effectively solves the problem that the current air-conditioning device is difficult to control the temperature of the primary side air body when the outdoor wind temperature is low.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Please refer to FIG1 , which is a schematic structural diagram of an air-conditioning device provided by an embodiment of the present invention.

[0028] In some embodiments, this embodiment provides an air conditioner, specifically an air conditioner device, which mainly includes a heat exchange core 1 , a primary air duct 2 , and a secondary air duct 3 .

[0029] The primary side air duct 2 refers to the path through which the primary side air flows, and is the channel formed by the primary side air flow through the enclosure of the shell. It can also be called the indoor air duct, and the air inlet at one end can bring in air from the room, and the air outlet at the other end can bring in air to the room. The secondary side air duct 3 refers to the path through which the secondary side air flows, and is the channel formed by the secondary side air flow through the enclosure of the shell. It can also be called the outdoor air duct, and the air inlet at one end can bring in air from the outside, and the air outlet at the other end can bring air to the outside. In some embodiments, the "primary side" field in the context can also be replaced with indoor, and the "secondary side" field in the context can also be replaced with outdoor.

[0030] In some embodiments, the primary side air duct 2 and the secondary side air duct 3 intersect at the heat exchange core 1, and the air in the primary side air duct and the air in the secondary side air duct can indirectly exchange heat inside the heat exchange core, and the gases generally do not mix at the heat exchange core 1, but mainly exchange heat, and generally exchange through the heat conductive wall. Therefore, the interior of the heat exchange core 1 generally includes two air guide ducts separated from each other by a heat conductive wall, one of which is a primary side channel corresponding to the primary side air duct 2, and the other air guide duct corresponds to the secondary side channel of the secondary side air duct 3. It should be noted that the specific structure inside the heat exchange core 1 can refer to the existing technology. In a simpler way, a cavity is formed on the inner wall of a block, such as a shell cavity, and one or more heat pipes are arranged in the cavity. The cavities of each heat pipe belong to the same air guide duct, and the cavity between the heat pipe and the inner wall of the cavity belongs to another air guide duct. In order to have a better heat exchange effect, a cross-flow heat exchange core 1 or a counter-flow heat exchange core 1 can be used. Among them, the cross-flow heat exchange core 1 has a low heat exchange efficiency and a large volume, which results in limited natural cooling time throughout the year. However, the counter-flow heat exchange core 1 has a larger average temperature difference and a high heat exchange efficiency. The required core size is smaller under the same heat exchange amount, which can reduce the size of the unit and reduce costs. As shown in Figure 2, the primary side channel and the secondary side channel of the counter-flow heat exchange core respectively include an inlet section 41, an intermediate section 42 and an outlet section 43. Several flow channels are formed in the primary side channel and the secondary side channel of the counter-flow heat exchange core respectively. The air in the primary side channel and the secondary side channel flows along the formed flow channels. Several flow channels in the primary side channel are arranged side by side, and several flow channels in the secondary side channel are also arranged side by side. Each flow channel can be formed by a partition. It can also be formed by process pleating, wherein the air bodies of the primary side channel and the secondary side channel are mainly heat exchanged in the middle section 42. Of course, heat exchange can also be carried out in the inlet section 41 and the outlet section 43. The airflow directions of the air bodies in the middle section 42 of the primary side channel and the secondary side channel of the countercurrent heat exchange core are opposite and parallel. Moreover, since the air bodies on both sides of the middle section 42 are parallel to each other and the airflow directions are opposite for heat exchange, the wind resistance of the air bodies in the channels on both sides is small and can fully contact the heat exchange wall surface, so that the heat exchange efficiency of the countercurrent heat exchange core is higher than that of other heat exchange cores.

[0031] In addition, the heat exchange core is a hexagon formed by stacking a number of hexagonal plates. As shown in Figure 2, the hexagon includes a first side, a second side, a third side, a fourth side, a fifth side and a sixth side that are adjacent to each other in sequence. The inlet section of the primary side channel is arranged on the first side, the outlet section of the primary side channel is arranged on the fourth side, the inlet section of the secondary side channel is arranged on the third side, and the outlet section of the secondary side channel is arranged on the sixth side.

[0032] In some embodiments, the primary air duct 2 sequentially passes through the primary air inlet 13, the primary channel of the heat exchange core 1, the evaporator 14, and the primary air outlet. Of course, the primary air duct 2 can also be cooled solely through the heat exchange core 1 or in combination with other methods without passing through the evaporator 14. That is, the primary air inlet 13, the primary channel of the heat exchange core 1, the evaporator 14, and the central ventilation cavity of the primary air outlet each constitute a portion of the primary air duct 2, so that as the air flows from one end of the primary air duct 2 to the other, it will sequentially pass through the primary air inlet 13, the primary channel of the heat exchange core 1, the evaporator 14, and the primary air outlet. The evaporator 14 is a structure used in mechanical refrigeration systems and has a heat-absorbing effect, that is, it cools the air passing through it, allowing the cooled air to flow out of the primary air outlet. Because the primary side is the indoor side, when in use, the indoor air enters the primary side air duct 2 from the primary side air inlet 13; when flowing through the heat exchange core 1, when a low-temperature fluid flows in the secondary side channel of the heat exchange core 1, the wind in the primary side air duct 2 can be initially cooled by the heat exchange core 1 in the primary side channel; then it flows into the evaporator 14. The evaporator 14 in the working state can cool the wind in the primary side air duct 2, and then discharge it back to the room from the primary side air outlet. Generally speaking, it is necessary to set up a corresponding primary side fan 15 to accelerate the flow rate of the wind body. The primary side fan 15 can be set at one or more locations in the primary side air inlet 13, the primary side air outlet, and other sections of the primary side air duct 2.

[0033] In some embodiments, the secondary air duct 3 generally passes through the secondary air inlet 4, the secondary channel of the heat exchange core 1, the condenser 5 and the secondary air outlet 6 in sequence, but of course it may not pass through the condenser 5. That is, the secondary air inlet 4, the secondary channel of the heat exchange core 1, the condenser 5 and the middle cavity of the secondary air outlet 6 respectively constitute a part of the secondary air duct 3, so that the air body will pass through the secondary air inlet 4, the secondary channel of the heat exchange core 1, the condenser 5 and the secondary air outlet 6 in sequence during the process of flowing from one end of the secondary air duct 3 to the other end. The condenser 5 is a structure used in a mechanical refrigeration system and has a heat release effect, that is, it heats the passing air body. Generally speaking, it is necessary to set up a corresponding secondary side fan 10 to accelerate the flow rate of the air body. The secondary side fan 10 can be set at one or more locations in the secondary side air inlet 4, the secondary side air outlet 6 and other sections of the secondary side air duct 3. The evaporator 14 and the condenser 5 can be located in the same mechanical refrigeration system.

[0034] In some embodiments, an air guide channel 7 is also included. The main function of the air guide channel 7 is to guide at least a portion of the air outlet side of the condenser 5 into the secondary side channel, so as to increase the temperature of the air entering the secondary side channel after re-entering the secondary side channel.

[0035] Specifically, the inlet end of the air guide channel 7 is connected to the outlet side of the secondary side channel of the heat exchange core 1 to optionally introduce the wind on the outlet side of the secondary side channel, and the outlet end of the air guide channel 7 is connected to the inlet side of the secondary side channel. The optional introduction of the wind on the outlet side of the heat exchange core 1 means that it can be introduced or not, such as by opening and closing the air valve set in the air guide channel 7, or by the fan in the air guide channel 7. The specific method to be adopted can be selected accordingly according to specific needs. It should be noted that when the wind is introduced into the air guide channel 7, it is not required to introduce all the wind on the outlet side of the secondary side channel of the heat exchange core 1. It can be introduced accordingly according to actual needs, and can be partially introduced or all of it, or different proportions of wind can be introduced according to different time periods or different needs.

[0036] In some embodiments, during use, in cold weather, the compressor of the unit is not working. At this time, it is necessary to introduce outdoor air to cool and / or dehumidify the indoor air. When the outdoor air temperature is too low, especially when the secondary side inlet air temperature is too low, the air guide channel 7 can be opened to introduce the air from the outlet side of the heat exchange core 1. Then, the air from the outlet side of the heat exchange core 1 can enter the secondary side channel of the heat exchange core 1 to achieve circulation. Because the secondary side channel inside the heat exchange core 1 absorbs heat from the indoor air, the temperature of the air at the outlet of the secondary side channel is relatively high, which can again prevent the air from entering the secondary side channel from being too low. In the above air conditioning equipment, an air guide channel 7 is added to the outlet side of the condenser 5. Through the air guide channel 7, the air from the outlet side of the evaporator 14 can be introduced into the secondary side channel, thereby preventing the air in the primary side duct from exchanging too much heat in the heat exchange core 1, and increasing the secondary side inlet air temperature of the heat exchange core 1, significantly reducing the dehumidification of the primary side inlet air, and reducing the impact on the humidity of the machine room. In summary, the air-conditioning device can effectively solve the problem that the current air-conditioning device is difficult to control the temperature of the primary side air body when the outdoor wind temperature is low.

[0037] In some embodiments, the inlet end of the air guide channel 7 can be connected to the cavity between the secondary air outlet 6 and the secondary channel outlet, such as between the condenser 5 and the secondary channel outlet or between the condenser 5 and the secondary air outlet 6. Of course, it can also be connected to the secondary air outlet 6, but the air volume at the secondary air outlet 6 is greatly affected by the environment. Connecting the inlet end of the air guide channel 7 to the cavity between the secondary air outlet 6 and the secondary channel outlet can avoid the above problem.

[0038] In some embodiments, in order to facilitate control of the flow direction of the air on the outlet side, the air guide channel 7 can be provided with an air guide valve 8, and the secondary air outlet 6 can be provided with a secondary air exhaust valve 9. The air guide valve 8 and the secondary air exhaust valve 9 are both adjustable in opening and closing, thereby adjusting the ratio of the air on the outlet side of the condenser 5 flowing into the air guide channel 7 and the secondary air outlet 6. When the air guide channel 7 does not need to return air, the air guide valve 8 can be closed, and the secondary air exhaust valve 9 can be opened; when the air guide channel 7 needs to return air, the air guide valve 8 can be opened, and the secondary air exhaust valve 9 can be fully opened, closed, or opened to a reduced degree.

[0039] It should be noted that a controller can be further configured to determine the outdoor dry-bulb temperature in real time and perform corresponding control. For example, a set value can be set based on actual environmental requirements as a reference. If the temperature is below the set value, the air guide valve 8 is controlled to open; if the temperature is above the sum of the set value and the hysteresis value, the air guide valve 8 is controlled to close. The specific hysteresis value can be adjusted according to humidity, ambient temperature, etc. to ensure that the dehumidification capacity meets the current dehumidification requirements.

[0040] In some embodiments, fans can be provided at both the secondary air outlet 6 and the air guide channel 7, and the direction of the air flow on the air outlet side of the condenser 5 can be controlled by opening and closing the fans and the speed of the fans. When the air return from the air guide channel 7 is not needed, the fan in the air guide channel 7 is turned off, while the fan at the secondary air outlet 6 is turned on; when the air return from the air guide channel 7 is needed, the fan in the air guide channel 7 is turned on, while the fan at the secondary air outlet 6 remains unchanged, is turned off, or has a reduced speed; and as the return air volume requirement of the air guide channel 7 increases, the speed of the fan in the air guide channel 7 increases accordingly, while the speed of the fan at the secondary air outlet 6 decreases accordingly. At that time, there were relatively many fans in this arrangement.

[0041] In some embodiments, a secondary fan 10 is preferably provided between the condenser 5 and the secondary air outlet 6. The inlet of the air guide duct 7 is connected to the air cavity between the secondary air outlet 6 and the outlet of the secondary fan 10. The secondary fan 10 maintains high air pressure at both the inlet of the air guide duct 7 and the secondary air outlet 6, reducing fan usage.

[0042] In some embodiments, the outlet of the air guide channel 7 can be connected to the air inlet side of the secondary air inlet 4. Considering that the air is not filtered by the filter, the air quality is poor and it is easy to cause core fouling. Based on this, it is preferred that the secondary air inlet 4 is equipped with a secondary filter 11, and the outlet of the air guide channel 7 is connected between the secondary air inlet 4 and the inlet side of the secondary channel. Directly to the inside of the secondary filter 11, the working pressure of the secondary filter 11 is reduced.

[0043] In some embodiments, in order to facilitate the arrangement of some of the above structures, a housing 12 may be included, wherein at least one of the secondary air inlet 4 and the secondary air outlet 6 is an opening on the housing 12. Specifically, both the secondary air inlet 4 and the secondary air outlet 6 may be openings on the housing 12. In this case, the air guide channel 7 may be disposed inside the housing 12 to avoid being placed externally, thereby reducing design and manufacturing costs.

[0044] In some embodiments, specifically, a square cavity can be provided in the box shell 12, and the heat exchange core 1 is provided in the middle of the square cavity. The square cavity forms a primary side air inlet cavity 16 connected to the primary side air inlet 13 on one side of the upper side of the heat exchange core 1, and forms a heating cavity 17 with the condenser 5 on the other side (generally in cold seasons, the condenser 5 here does not work). The square cavity forms a liquid collection cavity 18 and a primary side air outlet cavity 19 arranged up and down on one side of the lower side of the heat exchange core 1, and forms a cooling cavity 20 with the evaporator 14 on the other side; the liquid collection cavity 18 is provided with a secondary side air inlet cavity 21 located outside the square cavity on the side away from the cooling cavity 20, and the two are connected.

[0045] In some embodiments, the original fresh air valve and fresh air filter at the primary side air inlet 13 can be eliminated, and the original space can be set as part of the air guide channel 7. In this way, the air guide channel 7 can be set in the box shell 12 without changing other structures of the unit, so as to avoid external placement and reduce design and manufacturing costs.

[0046] In some embodiments, to facilitate the arrangement of the secondary air outlet 6, the secondary fan 10, etc., a secondary air outlet cavity 22 is preferably provided between the upper side of the rectangular cavity and the inner upper wall of the housing 12. The secondary air outlet cavity 22 is located above the heating cavity 17 and is connected to the heating cavity 17 via a ventilation opening extending through the upper cavity wall of the rectangular cavity. In this case, the secondary fan 10 is installed in the secondary air outlet cavity 22, with the air inlet side docked with the ventilation opening, i.e., installed close to the ventilation opening.

[0047] In some embodiments, in order to facilitate the arrangement of the inlet end of the air guide channel 7, it is preferred that a secondary air outlet 6 is provided on the upper cavity wall of the secondary air outlet cavity 22, and an opening is provided on one side of the air inlet cavity on one side of the secondary air outlet cavity 22, and the opening is provided with the air guide valve 8 to connect the air guide channel 7.

[0048] In some embodiments, to facilitate the arrangement of the air guide channel 7, the air guide channel 7 can be extended laterally away from the secondary air outlet cavity 22, and then extended downward from the corner of the square cavity to the secondary air inlet cavity 21. That is, the air guide channel 7 is arranged in an L-shape, that is, there is a gap between the top of the square cavity and the side close to the secondary air inlet 4 and the inner wall of the box shell 12 to form the above-mentioned air guide channel 7.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air conditioning device, comprising a heat exchange core, a primary side air duct and a secondary side air duct, wherein the primary side air duct and the secondary side air duct intersect at the heat exchange core and allow the air bodies in the primary side air duct and the secondary side air duct to exchange heat, and the secondary side air duct passes through a secondary side air inlet, a secondary side channel of the heat exchange core and a secondary side air outlet in sequence, characterized in that: It also includes an air guide channel, the inlet end of the air guide channel is connected to the air outlet side of the secondary side channel to optionally introduce the air body on the air outlet side of the secondary side channel, and the outlet end of the air guide channel is connected to the inlet side of the secondary side channel.

2. The air conditioning device according to claim 1, characterized in that: The inlet end of the air guide channel is connected to the cavity between the secondary air outlet and the air outlet side of the secondary channel; the air guide channel is provided with an air guide valve, and the secondary air outlet is provided with a secondary exhaust valve.

3. The air conditioning device according to claim 2, characterized in that: It also includes a condenser and a secondary side fan, the condenser is arranged in the cavity between the secondary side air outlet and the secondary side channel air outlet side, the secondary side fan is arranged between the condenser and the secondary side air outlet, and the inlet end of the air guide channel is connected to the air cavity between the secondary side air outlet and the secondary side fan outlet.

4. The air conditioning device according to claim 3, characterized in that: The secondary air inlet is provided with a secondary filter, and the outlet end of the air guide channel is connected between the secondary air inlet and the inlet side of the secondary channel.

5. The air conditioning device according to claim 4, characterized in that: It comprises a box shell, at least one of the secondary air inlet and the secondary air outlet is an opening opened on the box shell, and the air guide channel is arranged in the box shell.

6. The air conditioning device according to claim 5, characterized in that: The primary side air duct passes through the primary side air inlet, the primary side channel of the heat exchange core, the evaporator and the primary side fan in sequence, and the evaporator and the condenser are located in the same mechanical refrigeration system.

7. The air conditioning device according to claim 6, characterized in that: The box shell has a square cavity in it, the heat exchange core is arranged in the middle of the square cavity, the square cavity forms a primary air inlet cavity connected to the primary air inlet on one of the two sides of the upper part of the heat exchange core, and forms a heating cavity with the condenser on the other side, the square cavity forms a liquid collection cavity and a primary air outlet cavity arranged up and down on one of the two sides of the lower part of the heat exchange core, and forms a cooling cavity for arranging the evaporator on the other side; a secondary air inlet cavity is arranged on the side of the liquid collection cavity away from the cooling cavity, and the two are connected.

8. The air conditioning device according to claim 7, characterized in that: A secondary air outlet cavity is provided between the upper side of the square cavity and the inner upper wall of the box shell. The secondary air outlet cavity is located at the upper part of the heating cavity and is connected through a ventilation opening that passes through the upper cavity wall of the square cavity. The secondary side fan is installed in the secondary air outlet cavity and connected to the ventilation opening.

9. The air conditioning device according to claim 8, characterized in that: The upper cavity wall of the secondary air outlet cavity is provided with a secondary air outlet, and a side of the secondary air outlet cavity close to the one air inlet cavity is provided with an opening provided with the air guide valve to connect with the air guide channel.

10. The air conditioning device according to claim 9, characterized in that: The air guiding channel extends laterally away from the secondary air outlet cavity, and then extends downward at the corner of the square cavity to the secondary air inlet cavity.

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