Constant-speed air conditioner and control method and device thereof

Abstract

The invention provides a constant-speed air conditioner and a control method and device thereof. A compressor of the constant-speed air conditioner is a variable-capacity compressor, the variable-capacity compressor can run in a full-load mode or a partial-load mode, and the control method comprises the steps that energy demand parameters are obtained and at least comprise the indoor temperature; and the running state of the variable-capacity compressor is controlled according to the energy demand parameters. According to the scheme, the compressor can be prevented from being frequently started and stopped, so that the comfort of a user is improved, the use experience of the user is improved, and economy is good.

Description

[0001] This application claims the priority of a Chinese patent application titled "Constant-Speed Air Conditioner and Its Control Method and Control Device", with the application number 202311543824.9 and filed on November 17, 2023. The content thereof should be incorporated into this application by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of air conditioning technology, and specifically refers to a constant-speed air conditioner and its control method and control device. Background Art

[0003] A constant-speed air conditioner refers to an air conditioner in which the rotational speed of the internal compressor motor remains constant, and the temperature is adjusted by turning the compressor on and off. Currently, in the control of the cooling capacity output of a constant-speed air conditioner, there are only two states: on and off. When the room heat load is small, frequent start-stop operations will reduce the comfort of users, affect the use experience, and also result in poor economy. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a constant-speed air conditioner and its control method and control device, which can avoid frequent start-stop of the compressor, thereby improving the comfort of users, enhancing the user experience, and having good economy.

[0005] To this end, an embodiment of this application provides a control method for a constant-speed air conditioner. The compressor of the constant-speed air conditioner is a variable-capacity compressor, and the variable-capacity compressor can operate at full load or partial load. The control method includes:

[0006] Obtain energy demand parameters, where the energy demand parameters at least include the indoor temperature;

[0007] Control the operating state of the variable-capacity compressor according to the energy demand parameters.

[0008] In the embodiment of this application, a variable-capacity compressor is introduced into the constant-speed air conditioner. The variable-capacity compressor can switch between the full-load operating state and the partial-load operating state according to the energy demand parameters. In this way, when the room heat load is large, the variable-capacity compressor can be controlled to operate at full load. When the room heat load is small, the variable-capacity compressor can be controlled to switch to partial-load operation, reducing the frequency of reaching the set target temperature range of the indoor temperature. Thus, frequent start-stop of the compressor can be avoided, which is beneficial to improving the comfort of users and enhancing the user experience.

[0009] An embodiment of this application also provides a control device, including a processor and a memory storing a computer program. When the processor executes the computer program, the steps of the control method as described in any of the above embodiments are implemented.

[0010] The embodiment of the present application further provides a constant-speed air conditioner, which includes a variable-capacity compressor and the control device described in the above embodiment. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a constant-speed air conditioner provided by some embodiments of the present application;

[0012] Figure 2 It is a schematic flowchart of a control method provided by some embodiments of the present application;

[0013] Figure 3a It is a schematic flowchart of the control method provided by some embodiments of the present application during the cooling operation of the constant-speed air conditioner;

[0014] Figure 3b It is a schematic flowchart of the control method provided by some embodiments of the present application during the heating operation of the constant-speed air conditioner;

[0015] Figure 4a It is a schematic flowchart of the control method provided by an embodiment of the present application during the cooling operation of the constant-speed air conditioner;

[0016] Figure 4b It is a schematic flowchart of the control method provided by an embodiment of the present application during the heating operation of the constant-speed air conditioner;

[0017] Figure 5a It is a schematic flowchart of the control method provided by an embodiment of the present application during the cooling operation of the constant-speed air conditioner;

[0018] Figure 5b It is a schematic flowchart of the control method provided by an embodiment of the present application during the heating operation of the constant-speed air conditioner.

[0019] In the Figure 1 drawings, the list of components represented by each reference numeral is as follows:

[0020] 1 Compressor, 2 Condenser, 3 Throttling device, 4 Evaporator, 5 Indoor temperature sensor, 6 Outdoor temperature sensor. Detailed Embodiments

[0021] The principles and features of the present application will be described below with reference to the drawings. The examples given are only used to explain the present application and are not intended to limit the scope of the present application.

[0022] The embodiment of the present application provides a control method for a constant-speed air conditioner. As Figure 1 shown, the constant-speed air conditioner may include a compressor 1 ( Figure 1 the component marked COMP.A in Figure 1 ), a condenser 2 ( Figure 1 the component marked Condenser in ), a throttling device 3 (such as an electronic expansion valve,Figure 1 the component marked with EEV A), the evaporator 4( Figure 1 the component marked with Evaporator). The fixed-speed air conditioner may further include an indoor temperature sensor 5 for detecting the indoor temperature (denoted as Tin)( Figure 1 the component marked with Tin) and an outdoor temperature sensor 6 for detecting the outdoor temperature (Tout)( Figure 1 the component marked with Tout).

[0023] The compressor is a variable-capacity compressor, and the variable-capacity compressor can operate at full load or partial load. In other words, the variable-capacity compressor can change its operating state by changing its capacity. When the capacity is large, it operates at full load, and when the capacity is small, it operates at partial load. However, the motor speed of the variable-capacity compressor can remain unchanged.

[0024] As Figure 2 shown, the control method includes:

[0025] Step S202: Obtain the energy demand parameters, and the energy demand parameters at least include the indoor temperature;

[0026] Step S204: Control the operating state of the variable-capacity compressor according to the energy demand parameters.

[0027] In the embodiment of the present application, a variable-capacity compressor is introduced into the fixed-speed air conditioner, and the variable-capacity compressor can switch between the full-load operating state and the partial-load operating state according to the energy demand parameters. In this way, when the room heat load is large, the variable-capacity compressor can be controlled to operate at full load. When the room heat load is small, the variable-capacity compressor can be controlled to switch to partial load operation, reducing the frequency of the indoor temperature reaching the set target temperature range. Thereby, the frequent start and stop of the compressor can be avoided, which is beneficial to improving the comfort of users and the user experience.

[0028] Among them, the specific type of the fixed-speed air conditioner in the embodiment of the present application is not limited. For example, it can be a central air conditioner or a split air conditioner. The fixed-speed air conditioner can be equipped with a wired controller, and the user can set the target temperature through the wired controller. The wired controller can be provided with an indoor temperature sensor for detecting the indoor environmental temperature. The unit can be provided with an outdoor temperature sensor for detecting the outdoor temperature. Of course, the unit can also obtain the outdoor temperature by connecting to the network.

[0029] The communication can be carried out between the remote controller and the control device of the unit (i.e., the main part of the constant-speed air conditioner, which is used to realize the refrigeration / heating function and includes structures such as a compressor, an evaporator, a condenser, a throttling device, and a control device (main control board)), so that the control device can obtain the target temperature set by the user and can also obtain the indoor temperature through the indoor temperature sensor of the remote controller. Or, there may be no communication between the remote controller and the control device of the unit, so that the control device cannot obtain the target temperature set by the user and cannot obtain the indoor temperature detected by the temperature sensor of the remote controller. In this case, the unit can be provided with an indoor temperature sensor for detecting the indoor temperature, and the indoor temperature sensor can be arranged at the return air outlet of the unit for detecting the indoor return air temperature.

[0030] Alternatively, the constant-speed air conditioner can also be equipped with a remote control. The user can set the target temperature through the remote control or can also set the target temperature through a control terminal (APP) such as a mobile phone or the operation panel of the constant-speed air conditioner, so that the control device of the unit can obtain the target temperature set by the user. And the unit can be provided with an indoor temperature sensor for detecting the indoor temperature, and the indoor temperature sensor can be arranged at the return air outlet of the unit for detecting the indoor return air temperature. In this way, the control device of the unit can obtain the indoor temperature and the target temperature set by the user.

[0031] According to whether the control device of the unit can obtain the target temperature set by the user, different control logics can be adopted.

[0032] When the control device of the unit cannot obtain the target temperature set by the user, if the variable-capacity compressor is controlled only based on the indoor temperature, it may not conform to the actual energy demand, which is not conducive to improving the energy efficiency and economy of the constant-speed air conditioner.

[0033] When the control device of the unit can obtain the target temperature set by the user and can also obtain the indoor temperature, controlling the variable-capacity compressor according to the indoor temperature and the set target temperature can conform to the actual energy demand, which is conducive to ensuring the energy efficiency and economy of the constant-speed air conditioner.

[0034] The situation where the control device of the unit cannot obtain the target temperature set by the user will be introduced first below.

[0035] In some exemplary embodiments, the energy demand parameters further include the outdoor temperature, the temperature-reaching shutdown frequency of the variable-capacity compressor, and the non-stop continuous operation duration of the variable-capacity compressor.

[0036] The control method further includes: controlling the start and stop of the variable-capacity compressor according to the signal of the control terminal. The control terminal can be, but is not limited to, a remote controller.

[0037] Controlling the operating state of the variable-capacity compressor according to the energy demand parameters includes:

[0038] Control the operating state of the variable-capacity compressor according to the indoor temperature, outdoor temperature, temperature-reached shutdown frequency of the variable-capacity compressor, and continuous non-shutdown operation duration of the variable-capacity compressor.

[0039] The control method provided in this embodiment can obtain energy demand parameters and control the start / stop and operating state of the variable-capacity compressor according to the energy demand parameters. The energy demand parameters include not only the indoor temperature, but also the outdoor temperature, temperature-reached shutdown frequency of the variable-capacity compressor, and continuous non-shutdown operation duration. Through these parameters, the actual energy demand can be determined more accurately, so that the control logic of the variable-capacity compressor can be optimized, making the operation output of the variable-capacity compressor more matched with the actual energy demand of the room, which is conducive to improving the energy efficiency of the fixed-speed air conditioner and the economy of the fixed-speed air conditioner.

[0040] In some exemplary embodiments, controlling the start / stop of the variable-capacity compressor according to the signal of the control terminal includes:

[0041] Based on receiving the start signal sent by the control terminal, control the variable-capacity compressor to start and operate at full load;

[0042] Based on the operation terminal stopping sending the start signal, control the variable-capacity compressor to stop (i.e., shutdown due to reaching temperature).

[0043] The operation terminal can be a wired controller. The user sets the target temperature (i.e., sets the target temperature) on the operation terminal. The control terminal is equipped with an indoor temperature sensor for detecting the indoor temperature. Therefore, the control terminal can send a start signal (i.e., cooling signal / heating signal) or not send a start signal to the control device of the unit according to the comparison result between the indoor temperature and the set target temperature. However, the control device of the fixed-speed air conditioner cannot obtain the target temperature set by the user and needs to control the start / stop of the variable-capacity compressor according to whether the operation terminal sends a cooling signal / heating signal.

[0044] Specifically, in the cooling mode, when the indoor ambient temperature is higher than the set target temperature, the wired controller outputs a cooling signal, and the control device starts the variable-capacity compressor to operate for cooling; when the indoor environment reaches the set target temperature, the wired controller stops outputting the cooling signal, and the control device shuts down the variable-capacity compressor. In the heating mode, when the indoor ambient temperature is lower than the set target temperature, the wired controller outputs a heating signal, and the control device starts the variable-capacity compressor to operate for heating; when the indoor environment reaches the set target temperature, the wired controller stops outputting the heating signal, and the control device shuts down the variable-capacity compressor.

[0045] In some exemplary embodiments, the control method further includes:

[0046] Record the number of temperature - reached shutdowns of the variable - capacity compressor. The number of temperature - reached shutdowns is used to determine the temperature - reached shutdown frequency of the variable - capacity compressor;

[0047] Based on the startup of the variable - capacity compressor, start timing. The timing is used to determine the continuous running duration without shutdown of the variable - capacity compressor. Based on the temperature - reached shutdown of the variable - capacity compressor, end the timing and clear the timer.

[0048] As the name implies, the temperature - reached shutdown frequency of the variable - capacity compressor refers to the shutdown frequency at which the variable - capacity compressor shuts down because the indoor temperature reaches the set target temperature range. It can be expressed by the number of temperature - reached shutdowns within each set reference duration, that is: the number of temperature - reached shutdowns / set reference duration. Taking the set reference duration as 1 hour (not limited to 1 hour) as an example, the temperature - reached shutdown frequency can be 2 times / h, 3 times / h, 4 times / h, etc. Therefore, after the constant - speed air conditioner is turned on, it is necessary to record the number of temperature - reached shutdowns of the variable - capacity compressor.

[0049] The continuous running duration without shutdown of the variable - capacity compressor refers to the duration during which the variable - capacity compressor continuously operates without shutting down. Within this duration range, it can be running at full load all the time, or running at partial load all the time, or running with full - load and partial - load switching (but without temperature - reached shutdown in the middle). Therefore, each time the variable - capacity compressor starts, it starts timing from zero, until the variable - capacity compressor shuts down due to reaching the temperature, then ends the timing and clears the timer, and starts timing again after the variable - capacity compressor starts again. Therefore, at any current moment, the continuous running duration without shutdown of the variable - capacity compressor is equal to the duration from the most recent startup moment before the current moment to the current moment. For example: if the variable - capacity compressor has been continuously running for 0.5 h since the last startup until the current moment, then the continuous running duration without shutdown of the variable - capacity compressor at the current moment is 0.5 h; if the variable - capacity compressor has been continuously running for 2 h since the last startup until the current moment, then the continuous running duration without shutdown of the variable - capacity compressor at the current moment is 2 h. As long as the variable - capacity compressor does not shut down due to reaching the temperature after this startup, the continuous running duration without shutdown of the variable - capacity compressor continues to increase. Once it shuts down due to reaching the temperature, the timer is cleared and starts timing again after the next startup.

[0050] In some exemplary embodiments, the temperature - reached shutdown frequency of the variable - capacity compressor is determined according to the following method:

[0051] Based on the fact that the startup duration of the air conditioner is less than the set reference duration, determine the number of temperature - reached shutdowns of the variable - capacity compressor from the startup of the constant - speed air conditioner to the current moment as the temperature - reached shutdown frequency of the variable - capacity compressor;

[0052] Based on the fact that the startup duration of the air conditioner is greater than or equal to the set reference duration, determine the number of temperature - reached shutdowns of the variable - capacity compressor within the set reference duration before the current moment as the temperature - reached shutdown frequency of the variable - capacity compressor.

[0053] The set reference duration can be denoted as t0. Taking t0 = 1 hour as an example:

[0054] Within the time period less than 1 hour after the air conditioner is turned on, the number of times the variable-capacity compressor reaches the temperature and stops within the time before the current moment is the temperature-reaching stop frequency at the current moment in times / h. After the air conditioner is turned on for more than 1 hour, the temperature-reaching stop frequency at the current moment is equal to the number of times the variable-capacity compressor reaches the temperature and stops within 1 hour before the current moment in times / h.

[0055] For example: When the constant-speed air conditioner is turned on for 15 min, the variable-capacity compressor reaches the temperature and stops 1 time; when it is turned on for 45 min, it reaches the temperature and stops 1 time; when it is turned on for 2 h, it reaches the temperature and stops 1 time. Then:

[0056] The temperature-reaching stop frequency at 10 min after being turned on is 0 times / h because the variable-capacity compressor has not reached the temperature and stopped within 10 min after being turned on; the temperature-reaching stop frequency at 30 min after being turned on is 1 time / h because the variable-capacity compressor has reached the temperature and stopped 1 time within 30 min after being turned on; the temperature-reaching stop frequency at 50 min after being turned on is 2 times / h because the variable-capacity compressor has reached the temperature and stopped 2 times within 50 min after being turned on; the temperature-reaching stop frequency at 1.5 h after being turned on is 1 time / h because the variable-capacity compressor has reached the temperature and stopped 1 time between half an hour and 1.5 h after being turned on; the temperature-reaching stop frequency at 2 h after being turned on is 1 time / h because the variable-capacity compressor has reached the temperature and stopped only 1 time between 1 h and 2 h after being turned on. And so on. Of course, the set reference duration is not limited to 1 hour.

[0057] In some exemplary embodiments, based on the indoor temperature, outdoor temperature, temperature-reaching stop frequency of the variable-capacity compressor, and non-stop continuous operation duration of the variable-capacity compressor, control the operating state of the variable-capacity compressor, including:

[0058] Based on the variable-capacity compressor being in the full-load operation state, determine whether the variable-capacity compressor switches to the part-load operation state according to the indoor temperature, outdoor temperature, and temperature-reaching stop frequency of the variable-capacity compressor;

[0059] Based on the determination that the variable-capacity compressor switches to the part-load operation state, control the variable-capacity compressor to switch to the part-load operation;

[0060] Based on the variable-capacity compressor being in the part-load operation state, determine whether the variable-capacity compressor switches to the full-load operation state according to the indoor temperature, outdoor temperature, and non-stop continuous operation duration of the variable-capacity compressor;

[0061] Based on the determination that the variable-capacity compressor switches to the full-load operation state, control the variable-capacity compressor to switch to the full-load operation.

[0062] The indoor temperature and the outdoor temperature can reflect the magnitude of the room's heat load to a certain extent and can provide a reference basis for the operating state of a variable-capacity compressor.

[0063] When the variable-capacity compressor is in a full-load operation state and the temperature-reaching shutdown frequency of the variable-capacity compressor is relatively high, it indicates that the operating output of the variable-capacity compressor is higher than the actual demand of the room, and it is necessary to frequently reduce the output by shutting down. Therefore, it can be used to determine whether the variable-capacity compressor switches to a part-load operation state.

[0064] When the variable-capacity compressor is in a part-load operation state and the non-stop continuous operation duration of the variable-capacity compressor is relatively long, it indicates that the variable-capacity compressor has been continuously operating for a long time without reaching the set target temperature range for the indoor temperature. This shows that the operating output of the variable-capacity compressor is lower than the actual demand of the room. Therefore, it can be used to determine whether the variable-capacity compressor switches to a full-load operation state.

[0065] In some exemplary embodiments, determining whether the variable-capacity compressor switches to a part-load operation state based on the indoor temperature, the outdoor temperature, and the temperature-reaching shutdown frequency of the variable-capacity compressor includes:

[0066] Based on the indoor temperature satisfying a first set condition and satisfying at least one of the following: the outdoor temperature satisfies a second set condition, the temperature-reaching shutdown frequency of the variable-capacity compressor satisfies a third set condition, it is determined that the variable-capacity compressor switches to a part-load operation state;

[0067] Based on the indoor temperature not satisfying the first set condition, or based on the outdoor temperature not satisfying the second set condition and the temperature-reaching shutdown frequency of the variable-capacity compressor not satisfying the third set condition, it is determined that the variable-capacity compressor continues to maintain a full-load operation state.

[0068] In other words, to determine that the variable-capacity compressor switches from full-load operation to part-load operation, two conditions need to be met: one is that the indoor temperature must satisfy the first set condition; the other is that at least one of the outdoor temperature and the temperature-reaching shutdown frequency satisfies the corresponding set condition. Requiring the indoor temperature to must satisfy the first set condition is to ensure that the indoor temperature is as much as possible within a suitable temperature range to ensure the user's comfort. Only on this basis is it allowed for the variable-capacity compressor to switch to part-load operation to improve economy. Both the outdoor temperature and the temperature-reaching shutdown frequency can be used to indicate the magnitude of the room's heat load, that is, they can also reflect the actual energy demand of the room. When at least one of the outdoor temperature and the temperature-reaching shutdown frequency satisfies the corresponding set condition, it can indicate that the operating output of the variable-capacity compressor is greater than the actual demand of the room. Therefore, the variable-capacity compressor switches to semi-load operation to reduce the temperature-reaching shutdown frequency and improve economy. Otherwise, the variable-capacity compressor continues to maintain full-load operation.

[0069] As for the order of judgment of the three parameters of indoor temperature, outdoor temperature, and temperature - reaching shutdown frequency, there is no restriction. It is possible to first judge the indoor temperature, then the outdoor temperature, and then the temperature - reaching shutdown frequency, as shown in Figure 4; it is also possible to first judge the indoor temperature, then the temperature - reaching shutdown frequency, and then the outdoor temperature. In this way, if the indoor temperature is judged first, when the judgment result is negative, it can be directly determined to continue running at full load without continuing to judge the outdoor temperature and the temperature - reaching shutdown frequency, thus simplifying the process. When the result of the first judgment of the outdoor temperature and the temperature - reaching shutdown frequency is positive during the judgment process, it can also be determined to switch to partial - load operation without continuing to judge whether the third parameter meets the conditions, thus simplifying the process.

[0070] Of course, the indoor temperature can also be judged in the middle or at the end.

[0071] In some embodiments, based on the constant - speed air conditioner running in the cooling mode:

[0072] The first set condition includes: the indoor temperature is less than the first set temperature and lasts for the first set duration. The second set condition includes: the outdoor temperature is less than the second set temperature and lasts for the second set duration, and the second set temperature is greater than the first set temperature. The third set condition includes: the temperature - reaching shutdown frequency of the variable - capacity compressor is greater than or equal to the set frequency.

[0073] Based on the constant - speed air conditioner running in the heating mode:

[0074] The first set condition includes: the indoor temperature is greater than the first set temperature and lasts for the first set duration. The second set condition includes: the outdoor temperature is greater than the second set temperature and lasts for the second set duration, and the second set temperature is greater than the first set temperature. The third set condition includes: the temperature - reaching shutdown frequency of the variable - capacity compressor is greater than or equal to the set frequency.

[0075] In some examples, the first set temperature (denoted as T1) can be in the range of but not limited to 26°C to 30°C, such as 26°C, 27°C, 28°C, 29°C, 30°C, etc. The first set duration (denoted as t1) can be in the range of but not limited to 10s to 20s, such as 10s, 12s, 14s, 16s, 18s, 20s, etc.

[0076] The second set temperature (denoted as T2) can be in the range of but not limited to 28°C to 32°C, such as 28°C, 29°C, 30°C, 31°C, 32°C, etc. The second set duration (denoted as t2) can be in the range of but not limited to 10s to 20s, such as 10s, 12s, 14s, 16s, 18s, 20s, etc.

[0077] The set frequency (denoted as k times / hour) can be within the range of but not limited to 2 times / hour to 5 times / hour, such as 2 times / hour, 3 times / hour, 4 times / hour, 5 times / hour, etc.

[0078] It can be understood that, in order to simplify the electronic control program, for the parameter values (such as duration values, temperature values, frequency values) of the first set condition, the second set condition, and the third set condition, the same parameter values can be set for the cooling operation and the heating operation. Of course, different parameter values can also be set for the cooling operation and the heating operation.

[0079] In some exemplary embodiments, based on the indoor temperature, the outdoor temperature, and the non-stop continuous operation duration of the variable capacity compressor, determining whether the variable capacity compressor switches to the full load operation state includes:

[0080] Based on satisfying at least one of the following: the indoor temperature satisfies the fourth set condition, the outdoor temperature satisfies the fifth set condition, and the non-stop continuous operation duration of the variable capacity compressor satisfies the sixth set condition, it is determined that the variable capacity compressor switches to the full load operation state;

[0081] Based on the indoor temperature not satisfying the fourth set condition, the outdoor temperature not satisfying the fifth set condition, and the non-stop continuous operation duration of the variable capacity compressor not satisfying the sixth set condition, it is determined that the variable capacity compressor continues to maintain the partial load operation state.

[0082] In other words, to determine whether the variable capacity compressor switches from partial load operation to full load operation, as long as one of the indoor temperature, the outdoor temperature, and the non-stop continuous operation duration of the variable capacity compressor satisfies the corresponding condition. Because whether the indoor temperature satisfies the fourth set condition, the outdoor temperature satisfies the fifth set condition, or the non-stop continuous operation duration of the variable capacity compressor satisfies the sixth set condition, it can indicate that the output of the variable capacity compressor is lower than the actual demand of the room. Therefore, the variable capacity compressor needs to switch to full load operation to ensure the user's comfort. Otherwise, the variable capacity compressor continues to maintain partial load operation.

[0083] As for the order of judgment of the three parameters of indoor temperature, outdoor temperature, and non-stop continuous operation duration, there is no restriction. The indoor temperature can be judged first, then the outdoor temperature, and then the non-stop continuous operation duration, as shown in Figure 4. No matter which parameter is judged first, as long as the judgment result is yes, it is determined to switch to full load operation, and there is no need to judge the subsequent parameters. Otherwise, it enters the judgment of the next parameter, which can simplify the process.

[0084] Of course, the indoor temperature can also be judged in the middle or at the end.

[0085] In some embodiments, based on the cooling operation of the constant speed air conditioner:

[0086] The fourth setting condition includes: the indoor temperature is greater than or equal to the third set temperature and lasts for the third set duration. The third set temperature is greater than the first set temperature.

[0087] The fifth setting condition includes: the outdoor temperature is greater than or equal to the fourth set temperature and lasts for the fourth set duration, and the fourth set temperature is greater than the third set temperature. The fourth set temperature is greater than the second set temperature.

[0088] The sixth setting condition includes: the non-stop continuous operation duration of the variable capacity compressor is greater than or equal to the fifth set duration.

[0089] Based on the heating operation of a constant-speed air conditioner:

[0090] The fourth setting condition includes: the indoor temperature is less than or equal to the third set temperature and lasts for the third set duration. The third set temperature is greater than the first set temperature.

[0091] The fifth setting condition includes: the outdoor temperature is less than or equal to the fourth set temperature and lasts for the fourth set duration, and the fourth set temperature is greater than the third set temperature. The fourth set temperature is greater than the second set temperature.

[0092] The sixth setting condition includes: the non-stop continuous operation duration of the variable capacity compressor is greater than or equal to the fifth set duration.

[0093] In some examples, the third set temperature (denoted as T3) can be in the range of but not limited to 28°C to 32°C, such as 28°C, 29°C, 30°C, 31°C, 32°C, etc. The third set duration (denoted as t3) can be in the range of but not limited to 10s to 20s, such as 10s, 12s, 14s, 16s, 18s, 20s, etc.

[0094] The fourth set temperature (denoted as T4) can be in the range of but not limited to 30°C to 34°C, such as 30°C, 31°C, 32°C, 33°C, 34°C, etc. The fourth set duration (denoted as t4) can be in the range of but not limited to 10s to 20s, such as 10s, 12s, 14s, 16s, 18s, 20s, etc.

[0095] The fifth set duration (denoted as t5) can be in the range of but not limited to 6h to 10h, such as 6h, 7h, 8h, 9h, 10h, etc.

[0096] It can be understood that, in order to simplify the electronic control program, for the parameter values (such as duration values, temperature values, frequency values) of the fourth setting condition, the fifth setting condition, and the sixth setting condition, the same parameter values can be set for the refrigeration operation and the heating operation. Of course, different parameter values can also be set for the refrigeration operation and the heating operation.

[0097] In one embodiment, such asFigure 3a As shown, when the constant-speed air conditioner operates in the cooling mode, the control method includes the following steps:

[0098] Step S302: Control the variable-capacity compressor to operate at full load;

[0099] Step S304: Determine whether the following conditions 1) and 2) are satisfied. Condition 1): Tin < T1 and lasts for t1; Condition 2): Tout < T2 and lasts for t2, and / or the temperature-reached shutdown frequency of the variable-capacity compressor ≥ k times / h. If so, proceed to step S306; otherwise, return to step S302;

[0100] Step S306: Control the variable-capacity compressor to operate at partial load;

[0101] Step S308: Determine whether at least one of the following is satisfied: Tin ≥ T3 and lasts for t3, Tout ≥ T4 and lasts for t4, the non-stop continuous operation duration of the variable-capacity compressor ≥ t5; If so, proceed to step S302; otherwise, return to step S306.

[0102] As Figure 3b shown, when the constant-speed air conditioner operates in the heating mode, the control method includes the following steps:

[0103] Step S312: Control the variable-capacity compressor to operate at full load;

[0104] Step S314: Determine whether the following conditions 1) and 2) are satisfied. Condition 1): Tin > T1 and lasts for t1; Condition 2): Tout > T2 and lasts for t2, and / or the temperature-reached shutdown frequency of the variable-capacity compressor ≥ k times / h. If so, proceed to step S316; otherwise, return to step S312;

[0105] Step S316: Control the variable-capacity compressor to operate at partial load;

[0106] Step S318: Determine whether at least one of the following is satisfied: Tin ≤ T3 and lasts for t3, Tout ≤ T4 and lasts for t4, the non-stop continuous operation duration of the variable-capacity compressor ≥ t5; If so, proceed to step S312; otherwise, return to step S316.

[0107] In one embodiment, as Figure 4a shown, when the constant-speed air conditioner operates in the cooling mode, the control method includes the following steps:

[0108] Step S402: Control the variable-capacity compressor to operate at full load;

[0109] Step S404: Determine whether Tin < T1 and lasts for t1; If so, proceed to step S406; if not, return to step S402;

[0110] Step S406: Determine whether Tout < T2 and lasts for t2; if yes, proceed to step S410, if no, proceed to step S408;

[0111] Step S408: Determine whether the temperature - reaching and shutdown frequency of the variable - capacity compressor ≥ k times / h; if yes, proceed to step S410, otherwise return to step S402;

[0112] Step S410: Control the variable - capacity compressor to operate at part - load;

[0113] Step S412: Determine whether Tin ≥ T3 and lasts for t3; if yes, proceed to step S402, if no, proceed to step S414;

[0114] Step S414: Determine whether Tout ≥ T4 and lasts for t4; if yes, proceed to step S402, if no, proceed to step S416;

[0115] Step S416: Determine whether the non - shutdown continuous operation duration of the variable - capacity compressor ≥ t5; if yes, proceed to step S402, otherwise return to step S410.

[0116] As Figure 4b shown, when the fixed - speed air conditioner operates in heating mode, the control method includes the following steps:

[0117] Step S422: Control the variable - capacity compressor to operate at full - load;

[0118] Step S424: Determine whether Tin > T1 and lasts for t1; if yes, proceed to step S426, if no, return to step S422;

[0119] Step S426: Determine whether Tout > T2 and lasts for t2; if yes, proceed to step S430, if no, proceed to step S428;

[0120] Step S428: Determine whether the temperature - reaching and shutdown frequency of the variable - capacity compressor ≥ k times / h; if yes, proceed to step S430, otherwise return to step S422;

[0121] Step S430: Control the variable - capacity compressor to operate at part - load;

[0122] Step S432: Determine whether Tin ≤ T3 and lasts for t3; if yes, proceed to step S422, if no, proceed to step S434;

[0123] Step S434: Determine whether Tout ≤ T4 and lasts for t4; if yes, proceed to step S422, if no, proceed to step S436;

[0124] Step S436: Determine whether the continuous running time of the variable-capacity compressor without shutdown ≥ t5; if yes, proceed to step S422, otherwise return to step S43.

[0125] Among them, T4 > T2, T3 > T1. T4 ranges from 30°C to 34°C, T2 ranges from 28°C to 32°C, T3 ranges from 28°C to 32°C, and T1 ranges from 26°C to 30°C. j ranges from 2 to 5.

[0126] t1 ranges from 10s to 20s, t2 ranges from 10s to 20s, t3 ranges from 10s to 20s, t4 ranges from 10s to 20s, and t5 ranges from 6h to 10h.

[0127] The following describes the situation where the control device of the unit obtains the target temperature set by the user.

[0128] In some exemplary embodiments, the energy demand parameters further include the set target temperature. The control method further includes: controlling the start and stop of the variable-capacity compressor according to the indoor temperature and the set target temperature.

[0129] Controlling the operating state of the variable-capacity compressor according to the energy demand parameters includes: controlling the operating state of the variable-capacity compressor according to the indoor temperature and the set target temperature.

[0130] Since the control device of the unit can obtain the target temperature set by the user and can also obtain the indoor temperature, controlling the start and stop and the operating state of the variable-capacity compressor according to the indoor temperature and the set target temperature can conform to the actual energy demand, which is beneficial to ensuring the energy efficiency and economy of the constant-speed air conditioner.

[0131] In some exemplary embodiments, controlling the start and stop and the operating state of the variable-capacity compressor according to the indoor temperature and the set target temperature includes:

[0132] Based on the variable-capacity compressor being in the shutdown state and the temperature difference value between the indoor temperature and the set target temperature satisfying the seventh set condition, controlling the variable-capacity compressor to start and operate at full load;

[0133] Based on the variable-capacity compressor being in the full-load operating state and the temperature difference value between the indoor temperature and the set target temperature satisfying the eighth set condition, controlling the variable-capacity compressor to switch to partial-load operation;

[0134] Based on the variable-capacity compressor being in the partial-load operating state and the temperature difference value between the indoor temperature and the set target temperature satisfying the ninth set condition, controlling the variable-capacity compressor to stop;

[0135] Based on the variable-capacity compressor being in the shutdown state and the temperature difference value between the indoor temperature and the set target temperature satisfying the tenth set condition, controlling the variable-capacity compressor to start and operate at partial load;

[0136] Based on the variable-capacity compressor being in a part-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfying the eleventh set condition, control the variable-capacity compressor to switch to full-load operation;

[0137] Based on the variable-capacity compressor being in a full-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfying the twelfth set condition, control the variable-capacity compressor to stop.

[0138] When the variable-capacity compressor is in a stopped state and the temperature difference value between the indoor temperature and the set target temperature satisfies the seventh set condition, it indicates that the indoor temperature has deviated significantly from the user-set target temperature, which will bring greater discomfort to the user. Therefore, the variable-capacity compressor starts and operates at full load to quickly return the indoor temperature to the comfortable temperature range.

[0139] When the variable-capacity compressor is in a full-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfies the eighth set condition, it indicates that the indoor temperature has approached the user-set target temperature. Therefore, the variable-capacity compressor switches to part-load operation to reduce the start-stop frequency of the compressor.

[0140] When the variable-capacity compressor is in a part-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfies the ninth set condition, it indicates that the indoor temperature has exceeded the user-set target temperature. Therefore, the variable-capacity compressor can stop to save energy and avoid discomfort to the user caused by the indoor temperature being too low (during cooling operation) or too high (during heating operation).

[0141] When the variable-capacity compressor is in a stopped state and the temperature difference value between the indoor temperature and the set target temperature satisfies the tenth set condition, it indicates that after the compressor has stopped for a period of time, the indoor temperature has rebounded but not severely. Therefore, the variable-capacity compressor can start but operate at part load.

[0142] When the variable-capacity compressor is in a part-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfies the eleventh set condition, it indicates that the part-load operation of the variable-capacity compressor is not sufficient to make the indoor temperature approach the set target temperature but continues to move away from the set target temperature, that is, the output of the variable-capacity compressor cannot meet the actual needs of the room. Therefore, the variable-capacity compressor switches to full-load operation.

[0143] When the variable-capacity compressor is in a full-load operation state and the temperature difference value between the indoor temperature and the set target temperature satisfies the twelfth set condition, it indicates that the indoor temperature has exceeded the user-set target temperature. Therefore, the variable-capacity compressor can stop to save energy and avoid discomfort to the user caused by the indoor temperature being too low (during cooling operation) or too high (during heating operation).

[0144] In some embodiments, the indoor temperature is denoted as Tin, and the set target temperature is denoted as Ts.

[0145] Among them, based on the constant-speed air conditioner operating in the cooling mode:

[0146] The seventh setting condition includes: Tin - Ts > a1, the eighth setting condition includes: Tin - Ts ≤ b1, the ninth setting condition includes: Tin - Ts ≤ d1, the tenth setting condition includes: Tin - Ts > c1, the eleventh setting condition includes Tin - Ts > a1, the twelfth setting condition includes: Tin - Ts ≤ d1, where a1 > 0, b1 > 0, c1 > 0, d1 ≤ 0, and a1 > b1 ≥ c1 > d1;

[0147] Based on the constant-speed air conditioner operating in the heating mode:

[0148] The seventh setting condition includes: Ts - Tin > a2, the eighth setting condition includes: Ts - Tin ≤ b2, the ninth setting condition includes: Ts - Tin ≤ d2, the tenth setting condition includes: Ts - Tin > c2, the eleventh setting condition includes Ts - Tin > a2, the twelfth setting condition includes: Ts - Tin ≤ d2, where a2 > 0, b2 > 0, c2 > 0, d2 ≤ 0, and a2 > b2 ≥ c2 > d2.

[0149] It can be understood that, in order to simplify the electronic control program, for the parameter values of the seventh setting condition, the eighth setting condition, the ninth setting condition, the tenth setting condition, the eleventh setting condition, and the twelfth setting condition, the same parameter values can be set for the cooling operation and the heating operation (such as a1 = a2, b1 = b2, c1 = c2, d1 = d2). Of course, different parameter values can also be set for the cooling operation and the heating operation (such as a1 ≠ a2, or b1 ≠ b2, or c1 ≠ c2, or d1 ≠ d2).

[0150] In some examples, the value ranges of a1 and a2 can be, but are not limited to, 1.5°C to 2.5°C, such as 1.5°C, 2°C, 2.5°C, etc. The value ranges of b1 and b2 can be, but are not limited to, 0.5°C to 1.5°C, such as 0.5°C, 1°C, 1.5°C, etc. The value ranges of c1 and c2 can be, but are not limited to, 0.5°C to 1.5°C, such as 0.5°C, 1°C, 1.5°C, etc. The value ranges of d1 and d2 can be, but are not limited to, -1°C to 0°C, such as -1°C, -0.5°C, 0°C, etc. In one embodiment, as Figure 5a shown, when the constant-speed air conditioner operates in the cooling mode, the control method includes the following steps:

[0151] After starting up, the variable-capacity compressor operates at full load.

[0152] When the variable-capacity compressor is operating at full load and Tin ≤ Ts + b is satisfied, the variable-capacity compressor switches to partial-load operation; when Tin ≤ Ts + d is satisfied, the variable-capacity compressor shuts down.

[0153] When the variable-capacity compressor is operating at partial load and Tin ≤ Ts + d is satisfied, the variable-capacity compressor shuts down; when Tin > Ts + a is satisfied, the variable-capacity compressor switches to full-load operation.

[0154] When the variable-capacity compressor is in the shutdown state and Tin > Ts + c is satisfied, the variable-capacity compressor starts and operates at partial load; when Tin > Ts + a is satisfied, the variable-capacity compressor starts and operates at full load.

[0155] As Figure 5b shown, when the constant-speed air conditioner is operating in heating mode, the control method includes the following steps:

[0156] After startup, the variable-capacity compressor operates at full load.

[0157] When the variable-capacity compressor is operating at full load and Tin ≥ Ts - b is satisfied, the variable-capacity compressor switches to partial-load operation; when Tin ≥ Ts - d is satisfied, the variable-capacity compressor shuts down.

[0158] When the variable-capacity compressor is operating at partial load and Tin ≥ Ts - d is satisfied, the variable-capacity compressor shuts down; when Tin < Ts - a is satisfied, the variable-capacity compressor switches to full-load operation.

[0159] When the variable-capacity compressor is in the shutdown state and Tin < Ts - c is satisfied, the variable-capacity compressor starts and operates at partial load; when Tin < Ts - a is satisfied, the variable-capacity compressor starts and operates at full load.

[0160] Among them, the value range of a is from 1.5°C to 2.5°C. The value range of b is from 0.5°C to 1.5°C. The value range of c is from 0.5°C to 1.5°C. The value range of d is from -1°C to 0°C.

[0161] The embodiment of the present application also provides a control device, including a processor and a memory storing a computer program. When the processor executes the computer program, it implements the steps of the control method in any one of the above embodiments, and thus has all the above beneficial effects, which will not be elaborated here.

[0162] A processor may be an integrated circuit chip with the ability to process signals. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0163] An embodiment of the present application also provides a constant-speed air conditioner, including a variable-capacity compressor and a control device as described in the above embodiment, and thus has all the above beneficial effects, which will not be elaborated herein.

[0164] An embodiment of the present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, it implements the steps of the control method in any one of the above embodiments, and thus has all the above beneficial effects, which will not be elaborated herein.

[0165] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0166] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0167] In this application, unless otherwise clearly stipulated or defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0168] In this application, unless otherwise clearly stipulated or defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0169] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0170] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0171] In any one or more of the above exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functionality may be stored on or transmitted via a computer-readable medium as one or more instructions or code and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium including any medium that facilitates transfer of a computer program, such as according to a communication protocol, from one place to another. In this way, the computer-readable medium generally corresponds to a non-transitory tangible computer-readable storage medium or a communication medium such as a signal or a carrier wave. The data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, code, and / or data structures for implementing the techniques described in this disclosure. A computer program product may include a computer-readable medium.

[0172] By way of example, and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM, or other optical disk storage, magnetic disk storage, or other magnetic storage devices, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection may be termed a computer-readable medium. By way of example, if instructions are transmitted using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. However, it should be understood that the computer-readable storage medium and the data storage medium do not include connections, carrier waves, signals, or other transient media, but rather are directed to non-transitory tangible storage media. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, or Blu-ray disc, etc., where disks typically reproduce data magnetically, while discs use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0173] For example, the instructions may be executed by one or more processors, such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other equivalent integrated or discrete logic circuitry. Thus, as used herein, the term "processor" may refer to any one of the foregoing structures or any other structure suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be implemented entirely in one or more circuits or logic elements.

[0174] The technical solutions of the embodiments of the present disclosure may be implemented in a wide variety of devices or apparatuses, including wireless handsets, integrated circuits (ICs) or a group of ICs (e.g., a chipset). The various components, modules, or units described in the embodiments of the present disclosure are emphasized to highlight the functional aspects of the devices configured to perform the described techniques, but need not necessarily be implemented by different hardware units. Rather, as described above, the various units may be combined in a codec hardware unit or provided by a collection of interoperating hardware units, including one or more processors as described above, in conjunction with appropriate software and / or firmware.

Claims

1. A control method for a constant speed air conditioner, characterized in that: The compressor of the fixed-speed air conditioner is a variable capacity compressor, which can operate at full load or partial load. The control method includes: Acquiring energy demand parameters, wherein the energy demand parameters at least include indoor temperature; The operating state of the variable capacity compressor is controlled according to the energy demand parameter.

2. The control method according to claim 1, characterized in that: The control method further includes: controlling the start and stop of the variable capacity compressor according to a signal from a control terminal; The energy demand parameters also include outdoor temperature, the frequency of temperature-reaching shutdown of the variable capacity compressor, and the duration of continuous operation of the variable capacity compressor without shutdown; The step of controlling the operating state of the variable capacity compressor according to the energy demand parameter comprises: The operating state of the variable capacity compressor is controlled according to the indoor temperature, the outdoor temperature, the temperature-reaching shutdown frequency of the variable capacity compressor, and the non-stop continuous operation time of the variable capacity compressor.

3. The control method according to claim 2, characterized in that: The controlling the start and stop of the variable capacity compressor according to the signal of the control terminal includes: Based on the start signal received from the control terminal, the variable capacity compressor is controlled to start and run at full load; The variable capacity compressor is controlled to stop based on the operation terminal stopping sending the start signal.

4. The control method according to claim 3, characterized in that: Also includes: Recording the number of temperature-reaching shutdowns of the variable capacity compressor, wherein the number of temperature-reaching shutdowns is used to determine the temperature-reaching shutdown frequency of the variable capacity compressor; Based on the variable capacity compressor starting, timing is started, and the timing is used to determine the continuous operation time of the variable capacity compressor without stopping; based on the variable capacity compressor reaching the temperature and stopping, the timing is ended and reset to zero.

5. The control method according to claim 4, characterized in that: The temperature-reaching shutdown frequency of the variable capacity compressor is determined according to the following method: Based on the fact that the power-on time of the air conditioner is less than the set reference time, the number of times the variable capacity compressor stops at a temperature reaching a certain temperature since the fixed speed air conditioner is turned on to the current moment is determined as the temperature reaching shutdown frequency of the variable capacity compressor; Based on the startup time of the air conditioner being greater than or equal to the set reference time, the number of temperature-reaching shutdown times of the variable capacity compressor within the set reference time before the current moment is determined as the temperature-reaching shutdown frequency of the variable capacity compressor.

6. The control method according to any one of claims 2 to 5, characterized in that: The controlling the operating state of the variable capacity compressor according to the indoor temperature, the outdoor temperature, the temperature-reaching shutdown frequency of the variable capacity compressor, and the non-stop continuous operation time of the variable capacity compressor comprises: Based on the variable capacity compressor being in a full load operation state, judging whether the variable capacity compressor is switched to a partial load operation state according to the indoor temperature, the outdoor temperature, and the temperature-reaching shutdown frequency of the variable capacity compressor; Based on determining that the variable capacity compressor is switched to the partial load operation state, controlling the variable capacity compressor to switch to the partial load operation; Based on the variable capacity compressor being in a partial load operation state, judging whether the variable capacity compressor is switched to a full load operation state according to the indoor temperature, the outdoor temperature, and the non-stop continuous operation time of the variable capacity compressor; Based on the determination that the variable capacity compressor is switched to the full load operation state, the variable capacity compressor is controlled to switch to the full load operation.

7. The control method according to claim 6, characterized in that: The step of judging whether the variable capacity compressor is switched to a partial load operation state according to the indoor temperature, the outdoor temperature, and the temperature reaching shutdown frequency of the variable capacity compressor comprises: Based on the indoor temperature satisfying the first setting condition and satisfying at least one of the following: the outdoor temperature satisfying the second setting condition, and the temperature reaching shutdown frequency of the variable capacity compressor satisfying the third setting condition, determining that the variable capacity compressor is switched to a partial load operation state; Based on the indoor temperature not satisfying the first setting condition, or based on the outdoor temperature not satisfying the second setting condition and the temperature-reaching shutdown frequency of the variable capacity compressor not satisfying the third setting condition, it is determined that the variable capacity compressor continues to maintain a full-load operation state.

8. The control method according to claim 7, characterized in that: Based on the cooling operation of the fixed speed air conditioner: The first setting condition includes: the indoor temperature is lower than the first setting temperature and lasts for a first setting time; The second setting condition includes: the outdoor temperature is lower than the second setting temperature and lasts for a second setting time, and the second setting temperature is higher than the first setting temperature; The third setting condition includes: the temperature-reaching shutdown frequency of the variable capacity compressor is greater than or equal to the set frequency; Based on the heating operation of the fixed speed air conditioner: The first setting condition includes: the indoor temperature is greater than the first setting temperature and lasts for a first setting time; The second setting condition includes: the outdoor temperature is greater than the second setting temperature and lasts for a second setting time, and the second setting temperature is greater than the first setting temperature; The third setting condition includes: the temperature-reaching shutdown frequency of the variable capacity compressor is greater than or equal to a set frequency.

9. The control method according to claim 8, characterized in that: The first set temperature is in the range of 26°C to 30°C, and the first set time is in the range of 10s to 20s; The second set temperature is in the range of 28° C. to 32° C., and the second set time is in the range of 10s to 20s; The set frequency is in the range of 2 times / hour to 5 times / hour.

10. The control method according to claim 6, characterized in that: The determining, based on the indoor temperature, the outdoor temperature, and the non-stop continuous operation time of the variable capacity compressor, whether the variable capacity compressor is switched to a full-load operation state comprises: Based on at least one of the following conditions being met: the indoor temperature meets the fourth setting condition, the outdoor temperature meets the fifth setting condition, and the non-stop continuous operation time of the variable capacity compressor meets the sixth setting condition, determining that the variable capacity compressor is switched to the full load operation state; Based on the fact that the indoor temperature does not satisfy the fourth setting condition, the outdoor temperature does not satisfy the fifth setting condition, and the non-stop continuous operation time of the variable capacity compressor does not satisfy the sixth setting condition, it is determined that the variable capacity compressor continues to maintain a partial load operation state.

11. The control method according to claim 10, characterized in that: Based on the cooling operation of the fixed speed air conditioner: The fourth setting condition includes: the indoor temperature is greater than or equal to the third setting temperature and lasts for a third setting time; The fifth setting condition includes: the outdoor temperature is greater than or equal to the fourth setting temperature and lasts for a fourth setting time, and the fourth setting temperature is greater than the third setting temperature; The sixth setting condition includes: the non-stop continuous operation time of the variable capacity compressor is greater than or equal to the fifth setting time; Based on the heating operation of the fixed speed air conditioner: The fourth setting condition includes: the indoor temperature is less than or equal to the third setting temperature and lasts for a third setting time; The fifth setting condition includes: the outdoor temperature is less than or equal to the fourth setting temperature and lasts for a fourth setting time, and the fourth setting temperature is greater than the third setting temperature; The sixth setting condition includes: the non-stop continuous operation time of the variable capacity compressor is greater than or equal to the fifth setting time.

12. The control method according to claim 11, characterized in that: The third set temperature is in the range of 28° C. to 32° C., and the third set time is in the range of 10s to 20s; The fourth set temperature is in the range of 30° C. to 34° C., and the fourth set time is in the range of 10s to 20s; The fifth set duration is in the range of 6 hours to 10 hours.

13. The control method according to claim 1, characterized in that: The energy demand parameter also includes a set target temperature; the control method further includes: controlling the start and stop of the variable capacity compressor according to the indoor temperature and the set target temperature; The controlling the operating state of the variable capacity compressor according to the energy demand parameter includes: controlling the operating state of the variable capacity compressor according to the indoor temperature and the set target temperature.

14. The control method according to claim 13, characterized in that: Controlling the start and stop and the operating state of the variable capacity compressor according to the indoor temperature and the set target temperature includes: Based on the fact that the variable capacity compressor is in a stopped state and the temperature difference between the indoor temperature and the set target temperature satisfies a seventh setting condition, controlling the variable capacity compressor to start and run at full load; Based on the fact that the variable capacity compressor is in full load operation and the temperature difference between the indoor temperature and the set target temperature satisfies an eighth setting condition, controlling the variable capacity compressor to switch to partial load operation; Based on the fact that the variable capacity compressor is in a partial load operation state and the temperature difference between the indoor temperature and the set target temperature satisfies a ninth setting condition, controlling the variable capacity compressor to stop; Based on the fact that the variable capacity compressor is in a stopped state and the temperature difference between the indoor temperature and the set target temperature satisfies a tenth set condition, controlling the variable capacity compressor to start and operate at part load; Based on the fact that the variable capacity compressor is in a partial load operation state and the temperature difference between the indoor temperature and the set target temperature satisfies an eleventh setting condition, controlling the variable capacity compressor to switch to full load operation; Based on the fact that the variable capacity compressor is in a full-load operation state and the temperature difference between the indoor temperature and the set target temperature satisfies a twelfth setting condition, the variable capacity compressor is controlled to be shut down.

15. The control method according to claim 14, characterized in that: The indoor temperature is recorded as Tin, and the set target temperature is recorded as Ts; Wherein, based on the cooling operation of the constant speed air conditioner: The seventh setting condition includes: Tin-Ts>a1, the eighth setting condition includes: Tin-Ts≤b1, the ninth setting condition includes: Tin-Ts≤d1, the tenth setting condition includes: Tin-Ts>c1, the eleventh setting condition includes Tin-Ts>a1, and the twelfth setting condition includes: Tin-Ts≤d1, a1>0, b1>0, c1>0, d1≤0, and a1>b1≥c1>d1; Based on the heating operation of the fixed speed air conditioner: The seventh setting condition includes: Ts-Tin>a2, the eighth setting condition includes: Ts-Tin≤b2, the ninth setting condition includes: Ts-Tin≤d2, the tenth setting condition includes: Ts-Tin>c2, the eleventh setting condition includes Ts-Tin>a2, and the twelfth setting condition includes: Ts-Tin≤d2, a2>0, b2>0, c2>0, d2≤0, and a2>b2≥c2>d2.

16. A control device, characterized in that: The system comprises a processor and a memory storing a computer program, wherein when the processor executes the computer program, the steps of the control method according to any one of claims 1 to 15 are implemented.

17. A constant speed air conditioner, characterized in that: It comprises a variable capacity compressor and a control device as claimed in claim 16.

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