Fresh air air conditioner integrated machine and fresh air air conditioner integrated machine control method

Abstract

The present invention relates to a fresh air air conditioner integrated machine and a control method for the fresh air air conditioner integrated machine. The fresh air air conditioner integrated machine comprises a shell and a heat exchange core. A fresh air channel and an exhaust air channel are arranged in the shell. The fresh air channel and the exhaust air channel exchange heat through the heat exchange core. The space in the exhaust air channel downstream of the heat exchange core is an exhaust air outlet channel. An exhaust fan and an exhaust air heat exchanger are arranged in the exhaust air outlet channel. The space in the fresh air channel upstream of the heat exchange core is a fresh air inlet channel. A mixed air port that can be connected to the fresh air inlet channel is arranged on the side wall of the exhaust air outlet channel. The exhaust fan, the mixed air port and the exhaust air heat exchanger are arranged in sequence in the exhaust air flow direction. When the fresh air air conditioner integrated machine enters the mixed air mode and the mixed air port is turned on, the air pressure on this side of the exhaust air outlet channel is greater than the air pressure on this side of the fresh air inlet channel, thereby ensuring that the airflow passing through the mixed air port flows from the exhaust air outlet channel to the fresh air inlet channel, so that the air leakage is more controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a fresh air air conditioning integrated machine and a fresh air air conditioning integrated machine control method. Background Art

[0002] With the development of the field of air-conditioning equipment, the working modes of fresh air air conditioners are becoming more and more diversified to meet the needs of consumers in different environments. When the outdoor temperature is low, in order to avoid condensation or ice on the heat exchange core in the fresh air air conditioner, the fresh air air conditioner will run a mixed air mode to return the indoor air that has been heat exchanged by the heat exchange core to the fresh air duct to mix with the fresh air. The airflow with a higher temperature after mixing will then enter the heat exchange core. However, in the mixed air mode of the general fresh air air conditioner, when the fresh air duct is connected to the exhaust duct, there is uncontrollable air leakage, which makes it impossible to effectively avoid condensation or ice on the heat exchange core. Summary of the invention

[0003] In response to the technical problem of uncontrollable air leakage when the fresh air duct and the exhaust air duct are connected, the present invention proposes a fresh air air-conditioning integrated machine and a control method for the fresh air air-conditioning integrated machine, so that the airflow direction when the fresh air duct and the exhaust air duct are connected can be effectively controlled in the mixed air mode.

[0004] A fresh air air-conditioning integrated machine comprises a shell and a heat exchange core arranged in the shell, the shell is provided with a fresh air channel and an exhaust air channel, the fresh air channel and the exhaust air channel exchange heat through the heat exchange core, the space in the exhaust channel downstream of the heat exchange core is an exhaust outlet channel, the exhaust outlet channel is provided with an exhaust fan and an exhaust heat exchanger, the space in the fresh air channel upstream of the heat exchange core is a fresh air inlet channel, the side wall of the exhaust outlet channel is provided with an air mixing port that can be connected with the fresh air inlet channel, and the exhaust fan, the air mixing port and the exhaust heat exchanger are arranged sequentially in the exhaust air flow direction.

[0005] The above scheme provides a fresh air air conditioner integrated machine, by setting the mixed air outlet on the exhaust air outlet channel, and setting the mixed air outlet between the exhaust fan and the exhaust air heat exchanger, so that when the fresh air air conditioner integrated machine enters the mixed air mode and the mixed air outlet is turned on, the air pressure on this side of the exhaust air outlet channel is greater than the air pressure on this side of the fresh air inlet channel, thereby ensuring that the airflow passing through the mixed air outlet flows from the exhaust air outlet channel to the fresh air inlet channel. Therefore, in the mixed air mode, when the fresh air channel and the exhaust air channel are connected at the mixed air outlet, the air leakage controllability is strong, thereby effectively avoiding condensation or ice on the heat exchange core.

[0006] In one of the embodiments, it further includes a first air valve assembly, which is disposed at the air mixing vent and is used to control the on / off of the air mixing vent.

[0007] In one of the embodiments, the first air valve assembly includes a driving member and a valve body, the valve body is shielded at the air mixing outlet, the portion of the side wall of the exhaust air outlet passage where the air mixing outlet is arranged is a mounting wall, and the driving member is connected to the valve body for driving the valve body to move along the mounting wall.

[0008] In one embodiment, the valve body is a plate-shaped structure, and the valve body is arranged parallel to the installation wall.

[0009] In one of the embodiments, the first air valve assembly further includes a valve frame, the valve frame is disposed on the mounting wall, the valve frame is located at the periphery of the air mixing port, the valve frame is provided with a socket arranged along the moving direction of the valve body, and the valve body is inserted into the socket.

[0010] In one of the embodiments, the first air valve assembly further includes a damping net, which is disposed at the air mixing outlet, and the damping net is located between the valve frame and the mounting wall.

[0011] In one of the embodiments, it also includes a second air valve assembly, the space in the exhaust channel located upstream of the heat exchange core is an exhaust air inlet channel, the space in the fresh air channel located downstream of the heat exchange core is a fresh air outlet channel, the shell is provided with an internal circulation air outlet connecting the exhaust air inlet channel and the fresh air outlet channel, the second air valve assembly is arranged at the internal circulation air outlet, and is used to control the opening and closing of the internal circulation air outlet, and the second air valve assembly is electrically connected to the first air valve assembly.

[0012] In one embodiment, the structure of the second air valve assembly is the same as that of the first air valve assembly.

[0013] In one of the embodiments, a fresh air fan and a fresh air heat exchanger are provided in the fresh air outlet channel, and the fresh air fan, the internal circulation air outlet and the fresh air heat exchanger are arranged in sequence in the fresh air circulation direction.

[0014] In one embodiment, the outlet in the exhaust channel for communicating with the outside is an exhaust port, and the exhaust heat exchanger is intercepted at the exhaust port, so that the airflow in the exhaust channel is discharged outdoors after heat exchange through the exhaust heat exchanger;

[0015] The outlet in the fresh air channel for communicating with the indoor room is an air supply outlet, and the fresh air heat exchanger is intercepted at the air supply outlet, so that the airflow in the fresh air channel is discharged into the indoor room after heat exchange through the fresh air heat exchanger.

[0016] A method for controlling a fresh air air conditioner integrated machine is used to control the fresh air air conditioner integrated machine, and the control method comprises the following steps:

[0017] When the fresh air air conditioner enters the mixed air mode, controlling the mixed air outlet to be turned on;

[0018] The opening size of the air mixing vent is obtained, and the opening of the second air valve assembly is adjusted according to the opening size of the air mixing vent to balance the indoor and outdoor pressures.

[0019] The above scheme provides a control method for a fresh air air-conditioning integrated unit. When the fresh air air-conditioning integrated unit enters the mixed air mode, the opening of the second air valve assembly is adjusted according to the opening size of the mixed air outlet, so as to balance the indoor and outdoor pressures and avoid positive pressure in the room in the mixed air mode, which causes indoor air to leak from indoor gaps and waste resources.

[0020] In one embodiment, the following steps are also included:

[0021] Obtaining the mixed air temperature th in the fresh air intake channel;

[0022] The opening size of the air mixing vent is adjusted according to the air mixing temperature th. The higher the air mixing temperature th is, the smaller the opening of the air mixing vent is.

[0023] In one embodiment, the following steps are also included:

[0024] Obtaining the fresh air inlet temperature txj in the fresh air channel;

[0025] Compare the fresh air inlet temperature txj with the preset first low temperature T1 and the second low temperature T0, where T1 is less than T0:

[0026] When T1≤txj≤T0, the fresh air air conditioner is controlled to enter the mixed air mode;

[0027] When txj>T0, the fresh air air conditioner is controlled to enter the full heat exchange mode;

[0028] When txj<T1, the fresh air air-conditioning integrated unit is controlled to enter the internal circulation mode.

[0029] In one embodiment, when T1≤txj≤T0, controlling the fresh air air conditioner to enter the mixed air mode further includes the following steps:

[0030] Obtaining a difference ΔT between the fresh air inlet temperature txj in the fresh air channel and the exhaust fan outlet temperature tpc in the exhaust air channel;

[0031] The opening size of the air mixing vent is adjusted according to the difference ΔT, and the larger the difference ΔT is, the larger the opening of the air mixing vent is. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0034] Figure 1 This is a structural schematic diagram of the fresh air air conditioning integrated machine described in this embodiment;

[0035] Figure 2 This is a schematic diagram of the structure of the first air valve assembly in this embodiment;

[0036] Figure 3 This is a flow chart of the fresh air air conditioner integrated machine control method described in this embodiment;

[0037] Figure 4 It is a flow chart of a fresh air air conditioning integrated machine control method described in another embodiment.

[0038] Description of reference numerals:

[0039] 10. Fresh air air conditioner; 11. Shell; 111. Fresh air channel; 1111. Fresh air inlet channel; 1112. Fresh air outlet channel; 112. Exhaust channel; 1121. Exhaust outlet channel; 1122. Exhaust inlet channel; 113. Fresh air outlet; 114. Air supply outlet; 115. Exhaust outlet; 116. Fresh air heat exchanger; 117. Fresh air fan; 118. Exhaust air heat exchanger; 119. Exhaust fan; 12. First air valve assembly; 121. Driving member; 122. Valve body; 123. Valve frame; 124. Damping net; 125. Mounting wall; 13. Second air valve assembly; 14. Heat exchange core. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0041] like Figure 1 As shown, the fresh air air conditioner 10 includes a housing 11 and a heat exchange core 14 disposed in the housing 11. The housing 11 is provided with a fresh air passage 111 for introducing outdoor air into the room, and an exhaust passage 112 for introducing indoor air to the outside. When indoor and outdoor air circulate in the fresh air air conditioner 10, the heat or cold of the indoor air in the exhaust passage 112 can be at least partially transferred to the outdoor air in the fresh air passage 111 through the heat exchange core 14 in the fresh air air conditioner 10, thereby absorbing the heat or cold of the indoor air to be discharged outdoors, saving resources.

[0042] When the outdoor temperature is low, after the excessively low outdoor air enters the heat exchange core 14, condensation or ice will form on the heat exchange core 14. Based on this, the space in the exhaust channel 112 located downstream of the heat exchange core 14 is the exhaust air outlet channel 1121, and the space in the fresh air channel 111 located upstream of the heat exchange core 14 is the fresh air inlet channel 1111. The side wall of the exhaust air outlet channel 1121 is provided with a mixed air port that can be connected to the fresh air inlet channel 1111. As a result, the air with a certain amount of heat in the exhaust air outlet channel 1121 can enter the fresh air inlet channel 1111 and mix with the air with a lower temperature in the fresh air inlet channel 1111 to obtain mixed air, thereby increasing the temperature of the mixed air entering the heat exchange core 14, effectively avoiding the occurrence of condensation or ice.

[0043] However, when the mixed air outlet is turned on and the exhaust air outlet channel 1121 is connected to the fresh air inlet channel 1111, if it cannot be ensured that the airflow flowing through the mixed air outlet flows from the exhaust air outlet channel 1121 to the fresh air inlet channel 1111, it cannot be ensured that mixed air can be formed in the fresh air inlet channel 1111.

[0044] Based on this, Figure 1 As shown, in one embodiment, an exhaust fan 119 and an exhaust heat exchanger 118 are provided in the exhaust air outlet channel 1121, and the exhaust fan 119, the air mixing port and the exhaust heat exchanger 118 are arranged in sequence in the exhaust flow direction.

[0045] The above scheme provides a fresh air air conditioning integrated machine 10, by setting the mixed air outlet on the exhaust air outlet channel 1121, and setting the mixed air outlet between the exhaust fan 119 and the exhaust air heat exchanger 118, so that when the fresh air air conditioning integrated machine 10 enters the mixed air mode and the mixed air outlet is turned on, the air pressure on this side of the exhaust air outlet channel 1121 is greater than the air pressure on this side of the fresh air inlet channel 1111, thereby ensuring that the air flow passing through the mixed air outlet flows from the exhaust air outlet channel 1121 to the fresh air inlet channel 1111. Therefore, in the mixed air mode, the air leakage controllability of the fresh air channel 111 and the exhaust air channel 112 is strong when the mixed air outlet is connected, thereby effectively avoiding condensation or ice on the heat exchange core 14.

[0046] Moreover, in cooling mode, the exhaust heat exchanger 118 can be used as a condenser, and the coldness of the low-temperature air in the exhaust air outlet channel 1121 is further used to reduce the temperature of the exhaust heat exchanger 118. In heating mode, the exhaust heat exchanger 118 can be used as an evaporator, and the heat of the air to be discharged to the outside from the exhaust channel 112 is further used to exchange heat with the evaporator. In this way, the energy of the air discharged to the outside from the exhaust channel 112 is reused, and resources are further saved.

[0047] Specifically, Figure 1 As shown, in one embodiment, the outlet in the exhaust channel 112 for communicating with the outside is an exhaust port 115, and the exhaust heat exchanger 118 can be intercepted at the exhaust port 115, so that the airflow in the exhaust channel 112 is discharged outdoors after passing through the exhaust heat exchanger 118 for heat exchange. Figure 1 As shown, the exhaust port 115 is oriented to the left, and the exhaust heat exchanger 118 is longitudinally arranged to block the exhaust port 115, so that the airflow in the exhaust channel 112 is discharged outdoors only after heat exchange through the exhaust heat exchanger 118.

[0048] Furthermore, if Figure 1 As shown, in one embodiment, the fresh air air conditioning integrated machine 10 also includes a first air valve assembly 12, which is arranged at the mixed air outlet and is used to control the on and off of the mixed air outlet. By controlling the switch of the first air valve assembly 12, the on and off of the mixed air outlet is adjusted. And the opening size of the mixed air outlet can be adjusted by adjusting the opening of the first air valve assembly 12. When the required air flowing from the exhaust air outlet channel 1121 to the fresh air inlet channel 1111 is less, the opening of the first air valve assembly 12 is reduced. When the required air flowing from the exhaust air outlet channel 1121 to the fresh air inlet channel 1111 is more, the opening of the first air valve assembly 12 is increased.

[0049] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, the first air valve assembly 12 includes a driving member 121 and a valve body 122. The valve body 122 is shielded at the air mixing port, and the portion of the side wall of the exhaust air outlet channel 1121 where the air mixing port is arranged is a mounting wall 125, and the driving member 121 is connected to the valve body 122, and is used to drive the valve body 122 to move along the mounting wall 125.

[0050] When the on / off state of the air mixing vent needs to be adjusted, the driving member 121 starts to drive the valve body 122 to move along the mounting wall 125, rather than rotating relative to the mounting wall 125. If the valve body 122 rotates relative to the mounting wall 125, the valve body 122 will hinder the flow of gas in the fresh air channel 111 or the exhaust air channel 112 after rotation, so that the air flow thrust received by the valve body 122 when rotating is relatively large, which leads to greater difficulty in controlling the switch of the valve body 122. Therefore, in this embodiment, the driving member 121 is used to drive the valve body 122 to move, and the valve body 122 controls the on / off state of the air mixing vent by moving along the mounting wall 125, so that the driving member 121 can drive the valve body 122 to move with a relatively small force, and it is easier to control. At the same time, the influence of the valve body 122 on the air duct resistance in the fresh air channel 111 or the exhaust air channel 112 during the movement of the valve body 122 is reduced.

[0051] More specifically, if Figure 1 and Figure 3 As shown, the driving member 121 may be a motor. A gear rack matching structure or a screw nut matching structure may be used between the motor and the valve body 122 to convert the rotation of the motor into the movement of the valve body 122 .

[0052] Further, in one embodiment, if Figure 1 As shown, the installation wall 125 is located on a plane, and the valve body 122 moves on a plane.

[0053] Alternatively, in another embodiment, the fresh air outlet channel 1112 is a cylindrical channel, and the mounting wall 125 is a partial side wall of the cylindrical channel. Then the mounting wall 125 is an arc-shaped wall, and the valve body 122 moves along the arc-shaped wall. For example, the moving direction of the valve body 122 can be the axial direction of the cylindrical channel, or the circumferential direction of the cylindrical channel.

[0054] More specifically, if Figure 1 and Figure 2As shown, in one embodiment, the valve body 122 is a plate-like structure, and the valve body 122 is arranged parallel to the mounting wall 125. Figure 1 and Figure 2 As shown, the valve body 122 is a flat plate.

[0055] Furthermore, if Figure 2 As shown, in one embodiment, the first air valve assembly 12 further includes a valve frame 123, which is disposed on the mounting wall 125. The valve frame 123 is located at the periphery of the air mixing port, and the valve frame 123 does not hinder the flow of gas in the air mixing port. The valve frame 123 is provided with a plug hole arranged along the moving direction of the valve body 122, and the valve body 122 is inserted into the plug hole. When the driving member 121 drives the valve body 122 to move, the valve body 122 moves in the plug hole, and the valve frame 123 guides the valve body 122.

[0056] For example, Figure 2 As shown, the valve body 122 is arranged horizontally, and the insertion hole in the valve frame 123 is also arranged horizontally.

[0057] Furthermore, in one embodiment, the first air valve assembly 12 further includes a damping net 124 , which is disposed at the air mixing port and between the valve frame 123 and the mounting wall 125 .

[0058] The provision of the damping net 124 increases the resistance encountered by the gas when it flows from the exhaust outlet passage 1121 to the fresh air inlet passage 1111 through the air mixing port. By controlling the resistance of the damping net 124 during design, the proportional relationship between the opening of the valve body 122 and the corresponding air leakage can be controlled according to demand, thereby avoiding the situation where the air leakage is too large or too small after the valve body 122 is actuated. Moreover, the provision of the damping net 124 also allows the opening of the first air valve assembly 12 to be slightly larger than that when the amount of air required to flow from the exhaust outlet passage 1121 to the fresh air inlet passage 1111 is small, relative to the situation where the damping net 124 is not provided, thereby ensuring that no slits appear during the air flow, and effectively avoiding the generation of whistling noise during gas circulation.

[0059] Further, in one embodiment, if Figure 1 As shown, the space in the exhaust passage 112 located upstream of the heat exchange core 14 is the exhaust air inlet passage 1122, and the space in the fresh air passage 111 located downstream of the heat exchange core 14 is the fresh air outlet passage 1112. The housing 11 is provided with an internal circulation air outlet connecting the exhaust air inlet passage 1122 and the fresh air outlet passage 1112.

[0060] Furthermore, the fresh air air conditioning integrated machine 10 further includes a second air valve assembly 13. The second air valve assembly 13 is disposed at the internal circulation air outlet and is used to control the on-off of the internal circulation air outlet. The second air valve assembly 13 is electrically connected to the first air valve assembly 12.

[0061] Therefore, in the mixed air mode, the opening of the second air valve assembly 13 can be adjusted according to the opening of the first air valve assembly 12, so as to balance the indoor and outdoor pressures. In the mixed air mode, more gas is sent into the room and less gas is discharged outdoors, which leads to positive pressure in the room. If positive pressure occurs indoors, indoor air will leak to the outdoors through indoor gaps, resulting in a waste of cooling or heat, thereby wasting resources.

[0062] Furthermore, if Figure 1 As shown, in one embodiment, a fresh air fan 117 and a fresh air heat exchanger 116 are provided in the fresh air outlet channel 1112, and the fresh air fan 117, the internal circulation air outlet and the fresh air heat exchanger 116 are arranged in sequence in the fresh air circulation direction.

[0063] Similar to the setting position of the mixed air outlet, based on the fact that the internal circulation air outlet is located between the fresh air fan 117 and the fresh air heat exchanger 116, when the internal circulation air outlet is turned on, it can ensure that the airflow flows from the fresh air outlet channel 1112 to the exhaust air inlet channel 1122.

[0064] More specifically, if Figure 1 As shown, in one embodiment, the structure of the second air valve assembly 13 is the same as that of the first air valve assembly 12. In other words, the second air valve assembly 13 may also include the driving member 121 and the valve body 122, and the valve body 122 also moves along the portion of the side wall of the fresh air outlet passage 1112 where the second air valve assembly 13 is disposed.

[0065] Further, in one embodiment, the inlet for communicating with the outside in the fresh air channel 111 is a fresh air outlet 113. The fresh air outlet 113 is provided with a fresh air valve. The exhaust outlet 115 is provided with an exhaust air valve. When the fresh air air conditioner integrated machine 10 enters the internal circulation mode, the fresh air valve and the exhaust air valve are both in a closed state, and the first air valve assembly 12 is in an open state. When the fresh air air conditioner integrated machine 10 enters the full heat exchange mode, the fresh air valve and the exhaust air valve are both in an open state, and the first air valve assembly 12 is in a closed state. In the cooling mode or the heating mode, the fresh air heat exchanger 116 and the exhaust air heat exchanger 118 are further controlled to start on the basis of the full heat exchange mode. In the mixed air mode, the opening of the first air valve assembly 12 and the second air valve assembly 13 is further adjusted on the basis of the cooling mode or the heating mode.

[0066] Furthermore, if Figure 1 As shown, the outlet in the fresh air channel 111 for communicating with the indoor room is the air supply port 114, and the fresh air heat exchanger 116 intercepts the air at the air supply port 114, so that the airflow in the fresh air channel 111 is discharged into the indoor room after heat exchange through the fresh air heat exchanger 116.

[0067] In cooling mode, the fresh air heat exchanger 116 is used as an evaporator, so that the temperature of the air discharged from the fresh air channel 111 into the room is relatively low. In heating mode, the fresh air heat exchanger 116 is used as a condenser, so that the temperature of the air discharged from the fresh air channel 111 into the room is relatively high.

[0068] Furthermore, if Figure 3 As shown, in another embodiment, a control method for a fresh air air conditioner 10 is provided, which is used to control the fresh air air conditioner 10, and the control method includes the following steps:

[0069] When the fresh air air conditioning integrated machine 10 enters the mixed air mode, the mixed air outlet is controlled to be turned on;

[0070] The opening size of the air mixing vent is obtained, and the opening degree of the second air valve assembly 13 is adjusted according to the opening size of the air mixing vent to balance the indoor and outdoor pressures.

[0071] The above scheme provides a control method for a fresh air air-conditioning integrated machine 10. When the fresh air air-conditioning integrated machine 10 enters the mixed air mode, the opening of the second air valve assembly 13 is adjusted according to the opening size of the mixed air outlet, so as to balance the indoor and outdoor pressures and avoid positive pressure in the room in the mixed air mode, which causes indoor air to leak from indoor gaps and waste resources.

[0072] Specifically, the opening size of the air mixing port can be controlled by the opening degree of the first air valve assembly 12 .

[0073] Specifically, in one embodiment, the opening degree of the first air valve assembly 12 is n1, the opening degree of the second air valve assembly 13 is n2, and n2=n1×a, wherein the coefficient a is related to the air volume, internal pressure drop, first air valve assembly 12 and second air valve assembly 13 of each unit in the fresh air air-conditioning integrated machine 10.

[0074] Furthermore, in one embodiment, the control method of the fresh air air conditioning integrated machine 10 further includes the following steps:

[0075] Obtaining the mixed air temperature th in the fresh air intake channel 1111;

[0076] The opening size of the air mixing vent is adjusted according to the air mixing temperature th. The higher the air mixing temperature th is, the smaller the opening of the air mixing vent is.

[0077] When the fresh air air conditioner 10 is in the mixed air mode, the flow rate of the gas flowing from the mixed air vent to the exhaust air outlet passage 1121 to the fresh air inlet passage 1111 can be adjusted by controlling the opening of the first air valve assembly 12. The mixed air temperature th refers to the temperature of the gas flowing from the exhaust air outlet passage 1121 to the fresh air inlet passage 1111 or the resulting mixed air. The higher the mixed air temperature, the smaller the opening of the first air valve assembly 12 is required.

[0078] Specifically, Figure 4 As shown, a preset mixed air temperature Th can be set, and the opening of the first air valve assembly 12 can be adjusted by comparing the mixed air temperature th with the preset mixed air temperature Th. When |th-Th|≤△t1, the current opening of the first air valve assembly 12 is maintained. When th-Th>△t1, the opening of the first air valve assembly 12 is reduced. When th-Th<-△t1, the opening of the first air valve assembly 12 is increased. Wherein △t1 is a preset value.

[0079] Furthermore, in one embodiment, the control method of the fresh air air conditioning integrated machine 10 further includes the following steps:

[0080] Obtaining the fresh air inlet temperature txj in the fresh air channel 111;

[0081] Compare the fresh air inlet temperature txj with the preset first low temperature T1 and the second low temperature T0, where T1 is less than T0:

[0082] When T1≤txj≤T0, the fresh air air conditioning integrated machine 10 is controlled to enter the mixed air mode;

[0083] When txj>T0, the fresh air air conditioning integrated machine 10 is controlled to enter the full heat exchange mode;

[0084] When txj<T1, the fresh air air conditioning integrated machine 10 is controlled to enter the internal circulation mode.

[0085] When the fresh air air conditioning integrated machine 10 is started, the operation mode of the fresh air air conditioning integrated machine 10 is adjusted according to the relationship between the fresh air inlet temperature txj and the preset first low temperature T1 and second low temperature T0. When entering the mixed air mode, the opening of the first air valve assembly 12 and the second air valve assembly 13 can be adjusted according to the steps in the above embodiment.

[0086] Furthermore, in one embodiment, when T1≤txj≤T0, controlling the fresh air air conditioner 10 to enter the mixed air mode further includes the following steps:

[0087] Obtaining a difference ΔT between the fresh air inlet temperature txj in the fresh air channel 111 and the outlet temperature tpc of the exhaust fan 119 in the exhaust air channel 112;

[0088] The opening size of the air mixing vent is adjusted according to the difference ΔT, and the larger the difference ΔT is, the larger the opening of the air mixing vent is.

[0089] When adjusting the opening size of the air mixing vent, the difference ΔT between the fresh air inlet temperature txj and the outlet temperature tpc of the exhaust fan 119 in the exhaust passage 112 needs to be considered. The larger the difference ΔT is, the greater the difference between the temperature of the gas entering from the fresh air vent 113 of the fresh air passage 111 and the temperature of the gas in the exhaust air outlet passage 1121 is, and more gas in the exhaust air outlet passage 1121 is needed to increase the mixed air temperature, so the opening of the air mixing vent needs to be increased. Specifically, the opening of the air mixing vent can be increased by increasing the opening of the first air valve assembly 12.

[0090] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fresh air air conditioning integrated machine, characterized in that: The heat exchanger comprises a shell and a heat exchange core arranged in the shell, wherein a fresh air channel and an exhaust air channel are arranged in the shell, the fresh air channel and the exhaust air channel exchange heat through the heat exchange core, the space in the exhaust air channel located downstream of the heat exchange core is an exhaust air outlet channel, an exhaust fan and an exhaust air heat exchanger are arranged in the exhaust air outlet channel, the space in the fresh air channel located upstream of the heat exchange core is a fresh air inlet channel, a mixing air port which can be communicated with the fresh air inlet channel is arranged on the side wall of the exhaust air outlet channel, and the exhaust fan, the mixing air port and the exhaust air heat exchanger are arranged in sequence in the exhaust air flow direction; The air mixing port is provided with a first air valve assembly, which is used to control the on and off of the air mixing port; the first air valve assembly includes a driving member and a valve body, the valve body is shielded at the air mixing port, the part of the side wall of the exhaust air outlet passage where the air mixing port is provided is a mounting wall, and the driving member is connected to the valve body, which is used to drive the valve body to move along the mounting wall; It also includes a second air valve assembly, the space in the exhaust passage located upstream of the heat exchange core is an exhaust air inlet passage, the space in the fresh air passage located downstream of the heat exchange core is a fresh air outlet passage, the shell is provided with an internal circulation air outlet connecting the exhaust air inlet passage and the fresh air outlet passage, the second air valve assembly is arranged at the internal circulation air outlet, and is used to control the on and off of the internal circulation air outlet, and the second air valve assembly is electrically connected to the first air valve assembly; A fresh air fan and a fresh air heat exchanger are provided in the fresh air outlet channel, and the fresh air fan, the internal circulation air outlet and the fresh air heat exchanger are arranged in sequence in the fresh air circulation direction.

2. The fresh air air conditioning integrated machine according to claim 1, characterized in that: The valve body is a plate-shaped structure, and the valve body is arranged parallel to the installation wall.

3. The fresh air air conditioning integrated machine according to claim 1, characterized in that: The first air valve assembly also includes a valve frame, which is arranged on the installation wall and located at the periphery of the air mixing port. The valve frame is provided with a plug hole arranged along the moving direction of the valve body, and the valve body is inserted into the plug hole.

4. The fresh air air conditioning integrated machine according to claim 3, characterized in that: The first air valve assembly further includes a damping net, which is arranged at the air mixing vent and located between the valve frame and the mounting wall.

5. The fresh air air conditioning integrated machine according to claim 1, characterized in that: The structure of the second air valve assembly is the same as that of the first air valve assembly.

6. The fresh air air conditioning integrated machine according to claim 1, characterized in that: The outlet in the exhaust channel for communicating with the outside is an exhaust port, and the exhaust heat exchanger is intercepted at the exhaust port, so that the airflow in the exhaust channel is discharged outdoors after heat exchange through the exhaust heat exchanger; The outlet in the fresh air channel for communicating with the indoor room is an air supply outlet, and the fresh air heat exchanger is intercepted at the air supply outlet, so that the airflow in the fresh air channel is discharged into the indoor room after heat exchange through the fresh air heat exchanger.

7. A method for controlling a fresh air air conditioner, characterized in that: Used to control the fresh air air conditioning integrated machine according to claim 1, the control method comprises the following steps: When the fresh air air conditioner enters the mixed air mode, controlling the mixed air outlet to be turned on; The opening size of the air mixing vent is obtained, and the opening of the second air valve assembly is adjusted according to the opening size of the air mixing vent to balance the indoor and outdoor pressures.

8. The fresh air air conditioner integrated machine control method according to claim 7, characterized in that: The following steps are also included: Obtaining the mixed air temperature th in the fresh air intake channel; The opening size of the air mixing vent is adjusted according to the air mixing temperature th. The higher the air mixing temperature th is, the smaller the opening of the air mixing vent is.

9. The fresh air air conditioner integrated machine control method according to claim 7 or 8, characterized in that: The following steps are also included: Obtaining the fresh air inlet temperature txj in the fresh air channel; Compare the fresh air inlet temperature txj with the preset first low temperature T1 and the second low temperature T0, where T1 is less than T0: When T1≤txj≤T0, the fresh air air conditioner is controlled to enter the mixed air mode; When txj>T0, the fresh air air conditioner is controlled to enter the full heat exchange mode; When txj<T1, the fresh air air-conditioning integrated unit is controlled to enter the internal circulation mode.

10. The fresh air air conditioner integrated machine control method according to claim 9, characterized in that: When T1≤txj≤T0, when controlling the fresh air air conditioner to enter the mixed air mode, the following steps are also included: Obtaining a difference ΔT between the fresh air inlet temperature txj in the fresh air channel and the exhaust fan outlet temperature tpc in the exhaust air channel; The opening size of the air mixing vent is adjusted according to the difference ΔT, and the larger the difference ΔT is, the larger the opening of the air mixing vent is.

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