A control method of an air conditioner and an air conditioner

Abstract

The application provides a control method of an air conditioner and the air conditioner. The control method of the air conditioner comprises: heat exchange operation of the air conditioner; calculating an indoor-outdoor environment temperature difference according to an outdoor environment temperature and an indoor environment temperature; controlling an air outlet wind speed of a fresh air fan according to a size relationship between the indoor-outdoor environment temperature difference and a temperature difference threshold; and if the indoor-outdoor environment temperature difference is greater than or equal to the temperature difference threshold, determining the air outlet wind speed of the fresh air fan according to the outdoor environment temperature, the indoor environment temperature, an outdoor fan wind gear, an indoor fan wind gear and a compressor operation frequency. The application solves the technical problem that the wind speed control of the fresh air conditioner is not fine enough.

Description

Technical Field

[0001] This invention relates to the field of air conditioner control technology, and more specifically, to an air conditioner control method and an air conditioner. Background Technology

[0002] A fresh air conditioner is a healthy and comfortable type of air conditioner with a fresh air function. It uses a centrifugal fan to achieve air circulation and exchange between indoor and outdoor air, and also purifies the air. Ordinary air conditioners cannot keep indoor air fresh, while fresh air conditioners can introduce oxygen-rich outdoor air into the room after purification, increasing the oxygen content and freshness of the indoor air.

[0003] However, in related technologies, the airflow control of fresh air conditioners is not precise enough. When the fresh air velocity is too high, it can easily cause excessive fluctuations in indoor temperature, affecting the heat exchange efficiency of the air conditioner and resulting in poor user comfort. Summary of the Invention

[0004] To address the technical problem of insufficient precision in the airflow control of fresh air conditioners, this invention provides a control method for an air conditioner. The control method includes: the air conditioner operating in heat exchange mode; calculating the temperature difference between the indoor and outdoor environments based on the outdoor and indoor ambient temperatures; controlling the outlet airflow speed of the fresh air fan based on the relationship between the indoor and outdoor temperature difference and a temperature difference threshold; if the indoor and outdoor temperature difference is greater than or equal to the temperature difference threshold, then determining the outlet airflow speed of the fresh air fan based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency.

[0005] Compared with existing technologies, the technical effects achieved by this solution are as follows: When the temperature difference between indoor and outdoor environments is greater than or equal to the temperature difference threshold (i.e., when the temperature difference between indoor and outdoor environments is large), the air outlet speed of the fresh air fan can be determined based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency. This allows for precise adjustment of the fresh air volume introduced by the fresh air conditioner based on these environmental conditions and the operating conditions of the outdoor and indoor units, as well as the operating conditions of the outdoor and indoor fans and compressor. This avoids problems such as excessive air outlet speed and excessive fresh air volume from the fresh air conditioner, which can lead to excessive fluctuations in indoor ambient temperature and poor user comfort.

[0006] In one embodiment of the present invention, determining the outlet air velocity of the fresh air fan based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency includes: calculating the heat exchange per unit time of the air conditioner based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency; calculating an upper limit value for the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio; and determining the outlet air velocity of the fresh air fan based on the upper limit value for the fresh air velocity and the set fresh air velocity.

[0007] Compared with existing technologies, the technical effects achieved by this solution are as follows: By calculating the heat exchange per unit time of the air conditioner based on outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency, and by calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio, it is possible to achieve linkage control between indoor and outdoor ambient temperatures, indoor and outdoor fan speeds, compressor operating frequency, and the fresh air fan outlet velocity. By determining the fresh air fan outlet velocity based on the relationship between the upper limit of the fresh air velocity and the set fresh air velocity, the control of the fresh air fan outlet velocity can be made more rational and precise, thereby avoiding the problem of excessive fluctuations in indoor ambient temperature and poor user comfort caused by setting the fresh air velocity too high.

[0008] In one embodiment of the present invention, when the air conditioner is in cooling operation, the fresh air heat exchange loss coefficient includes the fresh air cooling capacity loss coefficient; the acceptable heat exchange loss ratio includes the acceptable cooling capacity loss ratio; and the calculation method for calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio is: K1*V xf *(T wh -T nh )≤b*p1; where K1 is the fresh air cooling loss coefficient; V xf For fresh air velocity; T wh Outdoor ambient temperature; T nh is the indoor ambient temperature; b is the acceptable cooling capacity loss ratio; p1 is the cooling capacity per unit time.

[0009] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: When the air conditioner is running in cooling mode, the upper limit of the fresh air velocity is calculated based on the relationship between the cooling capacity per unit time, the fresh air cooling capacity loss coefficient, the acceptable cooling capacity loss ratio, the temperature difference between indoor and outdoor environments, and the fresh air velocity.

[0010] In one embodiment of the present invention, when the air conditioner is in heating mode, the calculation method for the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat loss coefficient, and the acceptable heat exchange loss ratio is: K2*V xf *(T nh -T wh )≤d*p2; where K2 is the fresh air heat loss coefficient; V xf For fresh air velocity; T wh Outdoor ambient temperature; T nh d represents the indoor ambient temperature; d represents the acceptable heat loss ratio; p2 represents the heat output per unit time.

[0011] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: When the air conditioner is in heating mode, the upper limit of the fresh air velocity is calculated based on the relationship between the heating capacity per unit time, the fresh air heat loss coefficient, the acceptable heating capacity loss ratio, the temperature difference between indoor and outdoor environments, and the fresh air velocity.

[0012] In one embodiment of the present invention, determining the outlet air velocity of the fresh air fan based on the relationship between the upper limit of the fresh air velocity and the set fresh air velocity includes: if the set fresh air velocity is less than the upper limit of the fresh air velocity, then controlling the outlet air velocity of the fresh air fan to be the set fresh air velocity; if the set fresh air velocity is greater than or equal to the upper limit of the fresh air velocity, then controlling the outlet air velocity of the fresh air fan to be the upper limit of the fresh air velocity.

[0013] Compared with existing technologies, the technical effects achieved by this solution are as follows: If the set fresh air velocity is less than the upper limit of the fresh air velocity, it means that the current set fresh air velocity does not exceed the upper limit of the fresh air velocity. This avoids problems such as excessive airflow velocity from the fresh air conditioner's fan, excessive fresh air volume introduced by the fresh air conditioner leading to excessive indoor temperature fluctuations and poor user comfort. Therefore, the fresh air fan's fan velocity is controlled at the set fresh air velocity. If the set fresh air velocity is greater than or equal to the upper limit of the fresh air velocity, it means that the current set fresh air velocity has exceeded the upper limit of the fresh air velocity. If the fresh air fan's fan velocity is controlled at the set fresh air velocity, it will lead to excessive airflow velocity from the fresh air conditioner's fan, excessive fresh air volume introduced by the fresh air conditioner leading to excessive indoor temperature fluctuations and poor user comfort. Therefore, the fresh air fan's fan velocity is controlled at the upper limit of the fresh air velocity to ensure the comfort of indoor users.

[0014] In one embodiment of the present invention, the step of controlling the air outlet speed of the fresh air fan according to the relationship between the indoor and outdoor ambient temperature difference and the temperature difference threshold further includes: if the indoor and outdoor ambient temperature difference is less than the temperature difference threshold, then controlling the air outlet speed of the fresh air fan to the set fresh air speed.

[0015] Compared with existing technologies, the technical effects achieved by this solution are as follows: If the temperature difference between indoor and outdoor environments is less than the temperature difference threshold, it indicates that the current temperature difference between indoor and outdoor environments is small. The fresh air volume introduced by the fresh air conditioner and the air velocity of the fresh air fan will not cause significant fluctuations in the indoor environment temperature. Therefore, it is not necessary to adjust the fresh air volume introduced by the fresh air conditioner and the air velocity of the fresh air fan based on the outdoor environment temperature, indoor environment temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency. The air velocity of the fresh air fan can be directly controlled to the set fresh air speed. At this time, the air velocity of the fresh air fan is not affected by the indoor air conditioning effect.

[0016] In one embodiment of the present invention, the indoor-outdoor ambient temperature difference includes a first indoor-outdoor ambient temperature difference and a second indoor-outdoor ambient temperature difference; when the air conditioner is in cooling operation, T 温差1 =T wh -T nh When the air conditioner is in heating mode, T 温差2 =T nh -T wh Among them, T 温差1 The first indoor-outdoor temperature difference; T 温差2 The second indoor-outdoor temperature difference; T wh Outdoor ambient temperature; T nh This refers to the indoor ambient temperature.

[0017] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: when the air conditioner is in cooling mode, the difference between indoor and outdoor ambient temperatures is calculated by subtracting the indoor ambient temperature from the outdoor ambient temperature; when the air conditioner is in heating mode, the difference between indoor and outdoor ambient temperatures is calculated by subtracting the outdoor ambient temperature from the indoor ambient temperature.

[0018] This invention provides an air conditioner that implements any of the control methods described above. The air conditioner includes: a heat exchange control module for controlling the heat exchange operation of the air conditioner; a temperature difference calculation module for calculating the temperature difference between the indoor and outdoor environments based on the outdoor and indoor ambient temperatures; and a fresh air speed control module for controlling the air outlet speed of the fresh air fan based on the relationship between the indoor and outdoor ambient temperature difference and a temperature difference threshold. Wherein, if the indoor and outdoor ambient temperature difference is greater than or equal to the temperature difference threshold, the air outlet speed of the fresh air fan is determined based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency.

[0019] This invention provides an air conditioner that implements any of the control methods described above. The air conditioner includes an outdoor unit and an indoor unit. The outdoor unit includes an outdoor unit body and an outdoor temperature detection device disposed on the outdoor unit body. The indoor unit includes an indoor unit body, a fresh air module, and an indoor temperature detection module disposed on the indoor unit body.

[0020] This invention provides an air conditioner comprising: a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement any of the control methods for the air conditioner described above.

[0021] By adopting the technical solution of the present invention, the following technical effects can be achieved:

[0022] (1) When the temperature difference between indoor and outdoor environments is greater than or equal to the temperature difference threshold, that is, when the temperature difference between indoor and outdoor environments is large, the air velocity of the fresh air fan can be determined based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency. Based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency, the environmental conditions of the outdoor and indoor units of the fresh air conditioner, as well as the operating conditions of the outdoor fan, indoor fan, and compressor, can be known. Thus, the fresh air volume introduced by the fresh air conditioner can be precisely adjusted based on the environmental conditions of the outdoor and indoor units of the fresh air conditioner, as well as the operating conditions of the outdoor fan, indoor fan, and compressor. This can avoid the problems of excessive air velocity of the fresh air fan and excessive fresh air volume introduced by the fresh air conditioner, which can lead to excessive fluctuations in indoor ambient temperature and poor user comfort.

[0023] (2) By calculating the heat exchange per unit time of the air conditioner based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency, and by calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio, the linkage control between indoor and outdoor ambient temperature, indoor and outdoor fan speed, compressor operating frequency, and fresh air fan outlet velocity can be realized. By determining the fresh air fan outlet velocity based on the relationship between the upper limit of the fresh air velocity and the set fresh air velocity, the control of the fresh air fan outlet velocity can be made more reasonable and precise, thereby avoiding the problem of excessive fluctuations in indoor ambient temperature and poor user comfort caused by setting the fresh air velocity too high.

[0024] (3) If the set fresh air velocity is less than the upper limit of the fresh air velocity, it means that the current set fresh air velocity does not exceed the upper limit of the fresh air velocity. There will be no problem of excessive air velocity of the fresh air fan of the fresh air conditioner, excessive fresh air volume introduced by the fresh air conditioner, excessive fluctuation of indoor ambient temperature, and poor user comfort. Therefore, the air velocity of the fresh air fan is controlled to the set fresh air velocity. If the set fresh air velocity is greater than or equal to the upper limit of the fresh air velocity, it means that the current set fresh air velocity has exceeded the upper limit of the fresh air velocity. If the air velocity of the fresh air fan is controlled to the set fresh air velocity, there will be problems of excessive air velocity of the fresh air fan of the fresh air conditioner, excessive fresh air volume introduced by the fresh air conditioner, excessive fluctuation of indoor ambient temperature, and poor user comfort. Therefore, the air velocity of the fresh air fan is controlled to the upper limit of the fresh air velocity to ensure the user comfort. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating a control method for an air conditioner provided in an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of an air conditioner module provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] See Figure 1 This is a flowchart illustrating a control method for an air conditioner provided in an embodiment of the present invention. The control method includes, for example, the following: the air conditioner operates in heat exchange mode; calculating the temperature difference between the indoor and outdoor environments based on the outdoor and indoor ambient temperatures; controlling the airflow speed of the fresh air fan based on the relationship between the indoor and outdoor temperature difference and a temperature difference threshold; if the indoor and outdoor temperature difference is greater than or equal to the temperature difference threshold, determining the airflow speed of the fresh air fan based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency.

[0029] Understandably, when the temperature difference between indoor and outdoor environments is greater than or equal to the temperature difference threshold, i.e., when the temperature difference between indoor and outdoor environments is large, the airflow velocity of the fresh air fan can be determined based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency. This allows for the determination of the environmental conditions of the outdoor and indoor units of the fresh air conditioner, as well as the operating conditions of the outdoor fan, indoor fan, and compressor. Consequently, the fresh air volume introduced by the fresh air conditioner can be precisely adjusted based on these environmental conditions and the operating conditions of the outdoor and indoor units, and the fresh air volume introduced by the outdoor fan, indoor fan, and compressor. This helps to avoid problems such as excessive airflow velocity of the fresh air fan or excessive fresh air volume introduced by the fresh air conditioner, which can lead to excessive fluctuations in indoor ambient temperature and poor user comfort.

[0030] Furthermore, determining the outlet air velocity of the fresh air fan based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency includes: calculating the heat exchange per unit time of the air conditioner based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed setting, the indoor fan speed setting, and the compressor operating frequency; calculating an upper limit value for the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio; and determining the outlet air velocity of the fresh air fan based on the upper limit value and the set fresh air velocity. The set fresh air velocity is the fresh air velocity corresponding to the fresh air setting configured on the remote control.

[0031] Understandably, by calculating the heat exchange per unit time of the air conditioner based on outdoor and indoor ambient temperatures, outdoor fan speed, indoor fan speed, and compressor operating frequency, and by calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio, it is possible to achieve coordinated control between indoor and outdoor ambient temperatures, indoor and outdoor fan speeds, compressor operating frequency, and the fresh air fan's outlet velocity. By determining the fresh air fan's outlet velocity based on the relationship between the upper limit of the fresh air velocity and the set fresh air velocity, the control of the fresh air fan's outlet velocity can be made more rational and precise, thereby avoiding problems such as excessive fluctuations in indoor ambient temperature and poor user comfort caused by setting the fresh air velocity too high.

[0032] In one specific embodiment, when the indoor unit of the air conditioner is off and the fresh air module is on, the airflow speed of the fresh air fan is controlled to the set fresh air speed. When the indoor unit of the air conditioner is on and the fresh air module is on, the output speed of the fresh air motor, that is, the airflow speed of the fresh air fan, will be affected by the indoor and outdoor ambient temperatures, the fan speeds of the indoor and outdoor fans, and the operating frequency of the compressor.

[0033] Furthermore, when the air conditioner is operating in cooling mode, the fresh air heat exchange loss coefficient includes the fresh air cooling capacity loss coefficient; the acceptable heat exchange loss ratio includes the acceptable cooling capacity loss ratio; the calculation method for calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio is: K1*V xf *(T wh -T nh )≤b*p1; where K1 is the fresh air cooling loss coefficient; V xf For fresh air velocity; T wh Outdoor ambient temperature; T nh is the indoor ambient temperature; b is the acceptable cooling capacity loss ratio; p1 is the cooling capacity per unit time.

[0034] Understandably, when an air conditioner is running in cooling mode, the upper limit of the fresh air velocity is calculated based on the relationship between the cooling capacity per unit time, the fresh air cooling capacity loss coefficient, the acceptable cooling capacity loss ratio, the difference between indoor and outdoor ambient temperatures, and the fresh air velocity.

[0035] Furthermore, when the air conditioner is in heating mode, the fresh air heat exchange loss coefficient includes the fresh air heat loss coefficient; the acceptable heat exchange loss ratio includes the acceptable heating loss ratio; the calculation method for the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat loss coefficient, and the acceptable heat exchange loss ratio is: K2*V xf *(T nh -T wh )≤d*p2; where K2 is the fresh air heat loss coefficient; V xf For fresh air velocity; T wh Outdoor ambient temperature; T nh d represents the indoor ambient temperature; d represents the acceptable heat loss ratio; p2 represents the heat output per unit time.

[0036] Understandably, when an air conditioner is in heating mode, the upper limit of the fresh air velocity is calculated based on the relationship between the heating capacity per unit time, the fresh air heat loss coefficient, the acceptable heating capacity loss ratio, the difference between indoor and outdoor ambient temperatures, and the fresh air velocity.

[0037] Furthermore, determining the outlet air velocity of the fresh air fan based on the relationship between the upper limit of the fresh air velocity and the set fresh air velocity includes: if the set fresh air velocity is less than the upper limit of the fresh air velocity, then controlling the outlet air velocity of the fresh air fan to be the set fresh air velocity; if the set fresh air velocity is greater than or equal to the upper limit of the fresh air velocity, then controlling the outlet air velocity of the fresh air fan to be the upper limit of the fresh air velocity.

[0038] Understandably, if the set fresh air velocity is less than the upper limit, it means that the current set fresh air velocity does not exceed the upper limit, and there will be no problems such as excessive airflow velocity from the fresh air conditioner's fan or excessive fresh air volume introduced by the fresh air conditioner, leading to excessive fluctuations in indoor temperature and poor user comfort. Therefore, the fresh air fan's outlet velocity is controlled at the set fresh air velocity. If the set fresh air velocity is greater than or equal to the upper limit, it means that the current set fresh air velocity has exceeded the upper limit. If the fresh air fan's outlet velocity is controlled at the set fresh air velocity, there will be problems such as excessive airflow velocity from the fresh air conditioner's fan or excessive fresh air volume introduced by the fresh air conditioner, leading to excessive fluctuations in indoor temperature and poor user comfort. Therefore, the fresh air fan's outlet velocity is controlled at the upper limit to ensure the comfort of indoor users.

[0039] Furthermore, the step of controlling the air outlet speed of the fresh air fan based on the relationship between the indoor and outdoor ambient temperature difference and the temperature difference threshold also includes: if the indoor and outdoor ambient temperature difference is less than the temperature difference threshold, then controlling the air outlet speed of the fresh air fan to the set fresh air speed.

[0040] Understandably, if the temperature difference between indoor and outdoor environments is less than the temperature difference threshold, it means that the current temperature difference between indoor and outdoor environments is small. The fresh air volume introduced by the fresh air conditioner and the air velocity of the fresh air fan will not cause significant fluctuations in the indoor environment temperature. Therefore, it is not necessary to adjust the fresh air volume introduced by the fresh air conditioner and the air velocity of the fresh air fan based on the outdoor environment temperature, indoor environment temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency. You can directly control the air velocity of the fresh air fan to the set fresh air speed. At this time, the air velocity of the fresh air fan is not affected by the indoor air conditioning effect.

[0041] Furthermore, the indoor-outdoor temperature difference includes a first indoor-outdoor temperature difference and a second indoor-outdoor temperature difference; when the air conditioner is in cooling operation, T 温差1 =T wh -T nh When the air conditioner is in heating mode, T 温差2 =T nh -T wh Among them, T 温差1 The first indoor-outdoor temperature difference; T 温差2 The second indoor-outdoor temperature difference; T wh Outdoor ambient temperature; T nh This refers to the indoor ambient temperature.

[0042] It is understandable that when the air conditioner is in cooling mode, the difference between indoor and outdoor ambient temperatures is calculated by subtracting the indoor ambient temperature from the outdoor ambient temperature; when the air conditioner is in heating mode, the difference between indoor and outdoor ambient temperatures is calculated by subtracting the outdoor ambient temperature from the indoor ambient temperature.

[0043] In one specific embodiment, when the indoor unit of the air conditioner is turned on and the fresh air module is turned on, if the air conditioner is in cooling mode, T wh At 30℃, T nh The temperature is 24℃, the temperature difference threshold is 5℃, K1 is 0.3, b is 30%, and the air outlet speed of the fresh air fan is the set fresh air speed. Based on the outdoor ambient temperature, indoor ambient temperature, outdoor fan speed, indoor fan speed, and compressor operating frequency, the cooling capacity p1 per unit time is calculated to be 3000W. Based on K1*V... xf *(T wh -T nh )≤b*p1 yields V xf ≤(30%*3000w) / [(30℃-24℃)*0.3], i.e., V xf ≤500rpm, meaning the maximum fresh air speed is 500rpm; assuming the low setting of the fresh air fan corresponds to an airflow speed of 400rpm, the medium setting to 600rpm, and the high setting to 800rpm; when the fresh air speed is set to low, the fresh air fan outputs an airflow speed of 400rpm; when the fresh air speed is set to medium, the fresh air fan outputs an airflow speed of 500rpm.

[0044] Furthermore, in combination Figure 2 This invention provides an air conditioner 200, which includes, for example, a heat exchange control module 210, a temperature difference calculation module 220, and a fresh air speed control module 230. The heat exchange control module 210 controls the heat exchange operation of the air conditioner; the temperature difference calculation module 220 calculates the temperature difference between the indoor and outdoor environments based on the outdoor and indoor temperatures; the fresh air speed control module 230 controls the outlet air speed of the fresh air fan based on the relationship between the indoor and outdoor temperature difference and a temperature difference threshold. If the indoor and outdoor temperature difference is greater than or equal to the temperature difference threshold, the outlet air speed of the fresh air fan is determined based on the outdoor temperature, the indoor temperature, the outdoor fan speed, the indoor fan speed, and the compressor operating frequency. In one specific embodiment, the heat exchange control module 210, the temperature difference calculation module 220, and the fresh air speed control module 230 cooperate to achieve any of the control methods for the air conditioner described above, and achieve the same effect. To avoid repetition, further details are omitted here.

[0045] Furthermore, this invention provides an air conditioner comprising an outdoor unit and an indoor unit. The outdoor unit includes an outdoor unit body and an outdoor temperature detection device mounted on the outdoor unit body. The indoor unit includes an indoor unit body, a fresh air module, and an indoor temperature detection module mounted on the indoor unit body. The indoor unit has two air outlets: an air conditioning outlet and a fresh air outlet. This air conditioner implements any of the control methods described above and achieves the same effect; to avoid repetition, further details are omitted here.

[0046] Furthermore, this invention provides an air conditioner comprising: a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement any of the control methods of the air conditioner described above and achieve the same effect; to avoid repetition, it will not be described again here.

[0047] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes: The air conditioner is in heat exchange operation. Calculate the temperature difference between indoor and outdoor environments based on the outdoor and indoor ambient temperatures; The airflow speed of the fresh air fan is controlled according to the relationship between the indoor and outdoor ambient temperature difference and the temperature difference threshold. If the temperature difference between the indoor and outdoor environments is greater than or equal to the temperature difference threshold, then the heat exchange per unit time of the air conditioner is calculated based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed, the indoor fan speed, and the compressor operating frequency; the upper limit of the fresh air velocity is calculated based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio; the outlet air velocity of the fresh air fan is determined based on the upper limit of the fresh air velocity and the set fresh air velocity; if the set fresh air velocity is less than the upper limit of the fresh air velocity, then the outlet air velocity of the fresh air fan is controlled to be the set fresh air velocity; if the set fresh air velocity is greater than or equal to the upper limit of the fresh air velocity, then the outlet air velocity of the fresh air fan is controlled to be the upper limit of the fresh air velocity.

2. The control method for an air conditioner according to claim 1, characterized in that, When the air conditioner is operating in cooling mode, the fresh air heat exchange loss coefficient includes the fresh air cooling capacity loss coefficient; the acceptable heat exchange loss ratio includes the acceptable cooling capacity loss ratio; the calculation method for calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio is as follows: ； in, This is the coefficient for the loss of cooling capacity of fresh air; For fresh air velocity; Outdoor ambient temperature; Indoor ambient temperature; The acceptable percentage of cooling capacity loss; This refers to the cooling capacity per unit time.

3. The control method for an air conditioner according to claim 1, characterized in that, When the air conditioner is in heating mode, the fresh air heat exchange loss coefficient includes the fresh air heat loss coefficient; the acceptable heat exchange loss ratio includes the acceptable heating loss ratio; the calculation method for calculating the upper limit of the fresh air velocity based on the heat exchange per unit time, the fresh air heat exchange loss coefficient, and the acceptable heat exchange loss ratio is as follows: ； in, The coefficient for heat loss of fresh air; For fresh air velocity; Outdoor ambient temperature; Indoor ambient temperature; The acceptable percentage of heat loss; Heat produced per unit time.

4. The control method for an air conditioner according to claim 1, characterized in that, The method of controlling the air outlet speed of the fresh air fan based on the relationship between the indoor and outdoor ambient temperature difference and the temperature difference threshold also includes: If the temperature difference between the indoor and outdoor environments is less than the temperature difference threshold, then the air outlet speed of the fresh air fan is controlled to the set fresh air speed.

5. The control method for an air conditioner according to claim 1, characterized in that, The indoor-outdoor temperature difference includes a first indoor-outdoor temperature difference and a second indoor-outdoor temperature difference; When the air conditioner is in cooling mode ; When the air conditioner is in heating mode ; in, The first indoor-outdoor temperature difference; This represents the second indoor-outdoor temperature difference. Outdoor ambient temperature; This refers to the indoor ambient temperature.

6. An air conditioner, characterized in that, The air conditioner implements the control method for an air conditioner as described in any one of claims 1-5, and the air conditioner includes: The heat exchange control module is used to control the heat exchange operation of the air conditioner; The temperature difference calculation module is used to calculate the temperature difference between the indoor and outdoor environments based on the outdoor and indoor ambient temperatures. The fresh air speed control module is used to control the air outlet speed of the fresh air fan according to the relationship between the indoor and outdoor ambient temperature difference and the temperature difference threshold. If the temperature difference between the indoor and outdoor environments is greater than or equal to the temperature difference threshold, the air outlet speed of the fresh air fan is determined based on the outdoor ambient temperature, the indoor ambient temperature, the outdoor fan speed, the indoor fan speed, and the compressor operating frequency.

7. An air conditioner, characterized in that, The air conditioner implements the control method of the air conditioner as described in any one of claims 1-5. The air conditioner includes an outdoor unit and an indoor unit. The outdoor unit includes an outdoor unit body and an outdoor temperature detection device disposed on the outdoor unit body. The indoor unit includes an indoor unit body, a fresh air module, and an indoor temperature detection module disposed on the indoor unit body.

8. An air conditioner, characterized in that, The air conditioner includes: a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the control method of the air conditioner as described in any one of claims 1-5.

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