Control method and device of temperature control system, temperature control system and storage medium

Abstract

The embodiment of the invention relates to a control method and device of a temperature control system, the temperature control system and a storage medium. The method comprises the steps that a first pressure value is acquired; wherein the first pressure value is the actual pressure value of the exhaust side of a compressor of the temperature control system under the condition that the temperature control system is in a heating mode; determining a target operation threshold value of the temperature control system based on the first pressure value and a target pressure value of the exhaust side; the target operation threshold value comprises at least one of the following items: the target frequency upper limit value of the compressor and the target opening lower limit value of a valve body, and the valve body is used for controlling the refrigerant circulation amount of the temperature control system; and controlling the temperature control system to operate according to the target operation threshold value. Therefore, the heating stability of the temperature control system can be improved.

Description

Technical Field

[0001] The present application relates to the field of temperature control, and in particular to a control method and device for a temperature control system, a temperature control system and a storage medium. Background Art

[0002] In the related art, when some temperature control systems are in heating operation, the high-temperature refrigerant reaches the indoor unit heat exchanger to exchange heat for the condenser, and is converted from gas to liquid. The liquid refrigerant will be stored in the indoor unit and will not participate in the system circulation, resulting in a lower operating pressure of the unit and a worse heating comfort effect. In order to avoid the problem of poor comfort effect due to low system pressure, in conventional design systems, the indoor unit electronic expansion valve will have a certain opening to release the refrigerant stored in the indoor unit to increase the amount of refrigerant circulating in the system.

[0003] However, due to the complex installation pipeline environment and the various startup configurations of the unit, the traditional subcooling and fixed opening methods cannot fully cope with the complex application environment. Therefore, during the operation of the above temperature control system, there is a technical problem that the heating operation pressure continues to decrease, triggering the unit to continuously increase the compressor operation frequency and frequently defrost, which ultimately leads to low heating stability of the temperature control system. Summary of the invention

[0004] In view of this, in order to solve some or all of the above technical problems, the embodiments of the present application provide a control method and device for a temperature control system, a temperature control system and a storage medium.

[0005] In a first aspect, an embodiment of the present application provides a control method for a temperature control system, the method comprising:

[0006] Acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode;

[0007] Based on the first pressure value and the target pressure value of the exhaust side, a target operating threshold value of the temperature control system is determined; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system;

[0008] The temperature control system is controlled to operate according to the target operating threshold value.

[0009] In a possible implementation manner, determining a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side includes:

[0010] determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side;

[0011] When the first pressure value is greater than or equal to the target pressure value, determining a change amplitude value of the actual pressure value at the exhaust side;

[0012] Based on the change amplitude value, a target operation threshold value of the temperature control system is determined.

[0013] In a possible implementation manner, the target operation threshold value includes: a target frequency upper limit value of the compressor and a target opening lower limit value of the valve body; and

[0014] The determining, based on the change amplitude value, a target operation threshold value of the temperature control system includes:

[0015] Determining whether the change amplitude value is less than the first amplitude value;

[0016] When the change amplitude value is smaller than the first amplitude value, the current frequency upper limit value of the compressor is determined as the target frequency upper limit value of the compressor, and the current opening lower limit value of the valve body is determined as the target opening lower limit value of the valve body.

[0017] In a possible implementation, after determining whether the change amplitude value is less than the first amplitude value, the method further includes:

[0018] When the change amplitude value is greater than or equal to the first amplitude value, the current upper frequency limit value of the compressor is determined as the target upper frequency limit value of the compressor, and the sum of the current lower opening limit value of the valve body and the first opening is determined as the target lower opening limit value of the valve body.

[0019] In a possible implementation manner, the first opening is determined in the following manner:

[0020] determining an exhaust superheat of the temperature control system;

[0021] Based on the magnitude relationship between the exhaust gas superheat and the preset temperature, a first opening degree is determined. In a possible implementation manner, the preset temperature includes a first temperature; and

[0022] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature includes:

[0023] determining whether the exhaust gas superheat is greater than or equal to a first temperature;

[0024] When the exhaust gas superheat degree is greater than or equal to the first temperature, the first opening degree is determined to be a first value.

[0025] In a possible implementation manner, the preset temperature further includes a second temperature, and the second temperature is lower than the first temperature; and

[0026] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature further includes one of the following:

[0027] When the exhaust gas superheat is less than the second temperature, the first opening is determined to be a second value, wherein the second value is less than the first value; or

[0028] When the exhaust superheat is greater than or equal to the second temperature and the exhaust superheat is less than the first temperature, the first opening is determined as the most recently determined opening change, wherein the opening change is the first value or the second value.

[0029] In a possible implementation manner, the target operation threshold value includes a target frequency upper limit value of the compressor; and

[0030] After determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side, the method further includes:

[0031] When the first pressure value is less than the target pressure value, determining a current operating frequency of the compressor;

[0032] A target upper frequency limit of the compressor is determined based on the current operating frequency and a current upper frequency limit of the compressor.

[0033] In a possible implementation manner, determining the target upper frequency limit value of the compressor based on the current operating frequency and the current upper frequency limit value of the compressor includes one of the following:

[0034] In the case where the current operating frequency is equal to the current frequency upper limit value of the compressor, the sum of the current frequency upper limit value of the compressor and the first frequency is determined as the target frequency upper limit value of the compressor; or,

[0035] When the current operating frequency is less than the current frequency upper limit of the compressor, the current frequency upper limit of the compressor is determined as the target frequency upper limit of the compressor. In a possible implementation, the target pressure value is determined in the following manner:

[0036] Determine the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, and a reference pressure value; wherein the reference pressure value is: the pressure value at the detection position when the exhaust pipe length between the exhaust position and the detection position is the reference length;

[0037] The target pressure value is determined based on the exhaust pipe length and the reference pressure value.

[0038] In a second aspect, an embodiment of the present application provides a control device for a temperature control system, the device comprising:

[0039] An acquisition unit, configured to acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode;

[0040] a first determining unit, configured to determine a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, the valve body being used to control a refrigerant circulation amount of the temperature control system;

[0041] A control unit is used to control the operation of the temperature control system according to the target operation threshold value.

[0042] In a possible implementation manner, determining a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side includes:

[0043] determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side;

[0044] When the first pressure value is greater than or equal to the target pressure value, determining a change amplitude value of the actual pressure value at the exhaust side;

[0045] Based on the change amplitude value, a target operation threshold value of the temperature control system is determined.

[0046] In a possible implementation manner, the target operation threshold value includes: a target frequency upper limit value of the compressor and a target opening lower limit value of the valve body; and

[0047] The determining, based on the change amplitude value, a target operation threshold value of the temperature control system includes:

[0048] Determining whether the change amplitude value is less than the first amplitude value;

[0049] When the change amplitude value is smaller than the first amplitude value, the current frequency upper limit value of the compressor is determined as the target frequency upper limit value of the compressor, and the current opening lower limit value of the valve body is determined as the target opening lower limit value of the valve body.

[0050] In a possible implementation manner, after determining whether the change amplitude value is less than the first amplitude value, the device further includes:

[0051] The second determination unit is used to determine the current upper frequency limit value of the compressor as the target upper frequency limit value of the compressor when the change amplitude value is greater than or equal to the first amplitude value, and to determine the sum of the current lower opening limit value of the valve body and the first opening as the target lower opening limit value of the valve body.

[0052] In a possible implementation manner, the first opening is determined in the following manner:

[0053] determining an exhaust superheat of the temperature control system;

[0054] Based on the magnitude relationship between the exhaust gas superheat and the preset temperature, a first opening degree is determined. In a possible implementation manner, the preset temperature includes a first temperature; and

[0055] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature includes:

[0056] determining whether the exhaust gas superheat is greater than or equal to a first temperature;

[0057] When the exhaust gas superheat degree is greater than or equal to the first temperature, the first opening degree is determined to be a first value.

[0058] In a possible implementation manner, the preset temperature further includes a second temperature, and the second temperature is lower than the first temperature; and

[0059] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature further includes one of the following:

[0060] When the exhaust gas superheat is less than the second temperature, the first opening is determined to be a second value, wherein the second value is less than the first value; or

[0061] When the exhaust superheat is greater than or equal to the second temperature and the exhaust superheat is less than the first temperature, the first opening is determined as the most recently determined opening change, wherein the opening change is the first value or the second value.

[0062] In a possible implementation manner, the target operation threshold value includes a target frequency upper limit value of the compressor; and

[0063] After determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side, the device further includes:

[0064] a third determining unit, configured to determine a current operating frequency of the compressor when the first pressure value is less than the target pressure value;

[0065] The fourth determining unit is used to determine a target frequency upper limit value of the compressor based on the current operating frequency and a current frequency upper limit value of the compressor.

[0066] In a possible implementation manner, determining the target upper frequency limit value of the compressor based on the current operating frequency and the current upper frequency limit value of the compressor includes one of the following:

[0067] In the case where the current operating frequency is equal to the current frequency upper limit value of the compressor, the sum of the current frequency upper limit value of the compressor and the first frequency is determined as the target frequency upper limit value of the compressor; or,

[0068] In a case where the current operating frequency is less than a current upper frequency limit value of the compressor, the current upper frequency limit value of the compressor is determined as a target upper frequency limit value of the compressor.

[0069] In a possible implementation manner, the target pressure value is determined in the following manner:

[0070] Determine the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, and a reference pressure value; wherein the reference pressure value is: the pressure value at the detection position when the length of the exhaust pipe between the exhaust position and the detection position is the reference length;

[0071] The target pressure value is determined based on the exhaust pipe length and the reference pressure value.

[0072] In a third aspect, an embodiment of the present application provides a temperature control system, including:

[0073] Memory for storing computer programs;

[0074] The processor is used to execute the computer program stored in the memory, and when the computer program is executed, the method of any embodiment of the control method of the temperature control system of the first aspect of the present application is implemented.

[0075] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method of any embodiment of the method for controlling a temperature control system of the first aspect described above is implemented.

[0076] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer-readable code. When the computer-readable code is executed on a device, the processor in the device implements a method of any embodiment of the method for controlling a temperature control system in the first aspect described above.

[0077] The control method of the temperature control system provided in the embodiment of the present application can obtain a first pressure value; wherein the first pressure value is: when the temperature control system is in the heating mode, the actual pressure value on the exhaust side of the compressor of the temperature control system, and then, based on the first pressure value and the target pressure value on the exhaust side, the target operation threshold value of the temperature control system is determined; the target operation threshold value includes at least one of the following: the target frequency upper limit value of the compressor, the target opening lower limit value of the valve body, the valve body is used to control the refrigerant circulation amount of the temperature control system, and then, according to the target operation threshold value, the operation of the temperature control system is controlled. Thus, the upper frequency limit value of the compressor of the temperature control system and / or the lower opening limit value of the valve body can be determined by the actual pressure value when the temperature control system is in the heating mode and the target pressure value on the exhaust side. In this way, the heating stability of the temperature control system can be improved by limiting the upper frequency limit value of the compressor and / or the lower opening limit value of the valve body during the operation of the temperature control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0079] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0080] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0081] Figure 1 A schematic diagram of a flow chart of a control method for a temperature control system provided in an embodiment of the present application;

[0082] Figure 2 A schematic flow chart of another method for controlling a temperature control system provided in an embodiment of the present application;

[0083] Figure 3A flow chart of another method for controlling a temperature control system provided in an embodiment of the present application;

[0084] Figure 4 A schematic diagram of the structure of a control device for a temperature control system provided in an embodiment of the present application;

[0085] Figure 5 A schematic diagram of the structure of a temperature control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0086] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present application.

[0087] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present application are only used to distinguish between different steps, devices, modules and other objects, and do not represent any specific technical meanings, nor do they indicate the logical order between them.

[0088] It should also be understood that in this embodiment, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0089] It should also be understood that any component, data or structure mentioned in the embodiments of the present application can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0090] In addition, the term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0091] It should also be understood that the description of the various embodiments in this application focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0092] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0093] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the above-mentioned technologies, methods, and equipment should be considered as part of the specification.

[0094] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0095] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. To facilitate the understanding of the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0096] In order to solve the technical problem of low heating stability of the temperature control system in the prior art, the present application provides a control method, a device, a temperature control system and a storage medium for the temperature control system, which can improve the heating stability of the temperature control system.

[0097] Figure 1 A flow chart of a control method for a temperature control system provided in an embodiment of the present application. This method can be applied to one or more devices such as a temperature control system, a control device for a temperature control system, a smart phone, a laptop computer, a desktop computer, a portable computer, a server, etc. In addition, the execution subject of the present method can be hardware or software. When the above-mentioned execution subject is hardware, the execution subject can be one or more of the above-mentioned devices. For example, a single device can execute the present method, or multiple devices can cooperate with each other to execute the present method. When the above-mentioned execution subject is software, the present method can be implemented as multiple software or software modules, or as a single software or software module. No specific limitation is made here.

[0098] like Figure 1 As shown, the method specifically includes:

[0099] Step 101, obtaining a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of a compressor of the temperature control system when the temperature control system is in a heating mode.

[0100] In this embodiment, the temperature control system may be a system for controlling temperature. For example, the temperature control system may perform heating in a heating mode. In addition, in some cases, the temperature control system may also perform cooling in a cooling mode. As an example, the temperature control system may be a multi-split air conditioning system.

[0101] Among them, the multi-split air conditioning system is mainly composed of an outdoor unit and multiple indoor units. The outdoor units are placed in a suitable location outdoors, and the indoor units are distributed in different indoor spaces according to the room layout and needs. The outdoor units and indoor units are connected through refrigerant pipes such as copper pipes to form a closed refrigerant circulation system.

[0102] The exhaust side of the compressor may be the side where the compressor draws in low-temperature and low-pressure gaseous refrigerant and compresses it into high-temperature and high-pressure gaseous refrigerant and then discharges it during operation.

[0103] In practice, a pressure sensor may be provided on the exhaust side of the compressor to collect its real-time pressure value, that is, the above-mentioned first pressure value.

[0104] Step 102, based on the first pressure value and the target pressure value on the exhaust side, determine the target operating threshold value of the temperature control system; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of the valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system.

[0105] In this embodiment, the same or different target pressure values ​​may be set for different indoor units.

[0106] In some optional implementations of this embodiment, the target pressure value may be determined in the following manner:

[0107] First, the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, and the reference pressure value are determined.

[0108] The reference pressure value is: the pressure value at the detection position when the length of the exhaust pipe between the exhaust position and the detection position is the reference length.

[0109] The reference pressure value may be a preset pressure value.

[0110] The exhaust pipe length may be the length of the exhaust pipe between the exhaust position of the exhaust side and the detection position of the actual pressure value.

[0111] Then, the target pressure value is determined based on the exhaust pipe length and the reference pressure value.

[0112] Target pressure value Py=f(exhaust pipe length l, reference pressure value Pb).

[0113] The reference pressure value Pb may be set based on the comfort environment condition. f() represents the functional relationship.

[0114] In practice, due to the setting of the exhaust pipe and the detection position of the actual pressure value is located on the external machine side, a certain pressure loss will be caused. The loss is different for different pipe lengths. Therefore, the reference pressure value can be corrected or compensated by the exhaust pipe length. For example, assuming that the high pressure output by the standard pipe (that is, the reference pressure value mentioned above) is a, if the pressure loss corresponding to the pipe length is b, the target pressure value can be a+b. In addition, other formulas can be used to determine the target pressure value based on the exhaust pipe length and the reference pressure value. This is not limited here.

[0115] It can be understood that in the above optional implementation, the reference pressure value can be corrected or compensated by the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, so as to obtain the target pressure value. In this way, the determined target pressure value, the exhaust position and the exhaust pipe length between the detection position of the actual pressure value can be more matched, thereby further improving the heating stability of the temperature control system and improving user comfort.

[0116] The target operation threshold value may be a threshold value at which the temperature control system is expected to operate during its operation. The threshold value may include at least one of an upper limit value and a lower limit value. When the threshold value includes an upper limit value, the corresponding operation parameter during the operation of the temperature control system is less than or equal to the upper limit value; when the threshold value includes a lower limit value, the corresponding operation parameter during the operation of the temperature control system is greater than or equal to the upper limit value.

[0117] Here, a variety of methods may be used to determine the target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side.

[0118] As an example, the target operating threshold value of the temperature control system can be determined by determining the magnitude relationship between the first pressure value and the target pressure value on the exhaust side. For example, if the first pressure value is greater than or equal to the target pressure value on the exhaust side, then the target operating threshold value of the temperature control system can be determined to be [a1, b1]. Where a1 represents the lower limit value of the target operating threshold value, and b1 represents the upper limit value of the target operating threshold value. If the first pressure value is less than the target pressure value on the exhaust side, then the target operating threshold value of the temperature control system can be determined to be [a2, b2]. Where A2 represents the lower limit value of the target operating threshold value, and b2 represents the upper limit value of the target operating threshold value.

[0119] In addition, other methods may be used to determine the target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side. Please refer to the following description for details. No further details will be given here.

[0120] Step 103: Control the operation of the temperature control system according to the target operation threshold value.

[0121] In this embodiment, after the target operation threshold value is determined, the operation of the temperature control system may be further controlled according to the target operation threshold value.

[0122] For example, when the threshold value includes an upper limit value, the corresponding operating parameter during the operation of the temperature control system is less than or equal to the upper limit value; when the threshold value includes a lower limit value, the corresponding operating parameter during the operation of the temperature control system is greater than or equal to the upper limit value.

[0123] The control method of the temperature control system provided in the embodiment of the present application can obtain a first pressure value; wherein the first pressure value is: when the temperature control system is in the heating mode, the actual pressure value on the exhaust side of the compressor of the temperature control system, and then, based on the first pressure value and the target pressure value on the exhaust side, the target operation threshold value of the temperature control system is determined; the target operation threshold value includes at least one of the following: the target frequency upper limit value of the compressor, the target opening lower limit value of the valve body, the valve body is used to control the refrigerant circulation amount of the temperature control system, and then, according to the target operation threshold value, the operation of the temperature control system is controlled. Thus, the upper frequency limit value of the compressor of the temperature control system and / or the lower opening limit value of the valve body can be determined by the actual pressure value when the temperature control system is in the heating mode and the target pressure value on the exhaust side. In this way, the heating stability of the temperature control system can be improved by limiting the upper frequency limit value of the compressor and / or the lower opening limit value of the valve body during the operation of the temperature control system.

[0124] Figure 2 A flow chart of another method for controlling a temperature control system provided in an embodiment of the present application. Figure 2 As shown, the method specifically includes:

[0125] Step 201, obtaining a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode.

[0126] In this embodiment, step 201 and Figure 1 Step 101 in the corresponding embodiment is basically the same and will not be described again here.

[0127] Step 202: Determine whether the first pressure value is greater than or equal to the target pressure value on the exhaust side.

[0128] Step 203: When the first pressure value is greater than or equal to the target pressure value, determine the change amplitude of the actual pressure value at the exhaust side.

[0129] In this embodiment, the variation amplitude of the actual pressure value may be the variation amount of the actual pressure value at the exhaust side within a preset time interval.

[0130] For example, the pressure value on the exhaust side can be detected first (recorded as pressure value 1), and then, after an interval of time t, the pressure value on the exhaust side can be detected again (recorded as pressure value 2), and then the difference between pressure value 1 and pressure value 2 can be used as the change amplitude value of the actual pressure value on the exhaust side.

[0131] Step 204, based on the change amplitude value, determine the target operating threshold value of the temperature control system; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of the valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system.

[0132] In this embodiment, a variety of methods may be used to determine the target operating threshold value of the temperature control system based on the variation amplitude value.

[0133] As an example, a table or formula representing the corresponding relationship between the variation amplitude value and the target operation threshold value may be used to determine the target operation threshold value of the temperature control system based on the variation amplitude value.

[0134] Optionally, other methods may be used to determine the target operation threshold value of the temperature control system based on the change amplitude value. Please refer to the following description for details, which will not be described here.

[0135] Step 205: Control the operation of the temperature control system according to the target operation threshold value.

[0136] In this embodiment, step 205 and Figure 1 Step 103 in the corresponding embodiment is basically the same and will not be described again here.

[0137] In some optional implementations of this embodiment, the target operation threshold value includes: a target frequency upper limit value of the compressor and a target opening lower limit value of the valve body.

[0138] On this basis, the target operation threshold value of the temperature control system can be determined based on the change amplitude value in the following manner:

[0139] The first step is to determine whether the change amplitude value is smaller than the first amplitude value.

[0140] The first amplitude value may be a preset amplitude value. In practice, the value of the first amplitude value may be set based on the time interval corresponding to the change amplitude value. For example, the first amplitude value may be positively correlated with the time interval.

[0141] In the second step, when the change amplitude value is less than the first amplitude value, the current upper frequency limit value of the compressor is determined as the target upper frequency limit value of the compressor, and the current lower opening limit value of the valve body is determined as the target lower opening limit value of the valve body.

[0142] Here, during the operation of the compressor, the compressor usually operates in a certain frequency range, and the refrigerant circulation amount of the temperature control system is controlled by setting the lower limit value of the valve opening. Therefore, when the change amplitude value is less than the first amplitude value, the upper limit value of the frequency range of the compressor operation can be maintained, that is, the current upper limit value of the frequency of the compressor can be determined as the target upper limit value of the frequency of the compressor; and the lower limit value of the valve opening can be maintained, that is, the current lower limit value of the valve opening can be determined as the target lower limit value of the valve opening.

[0143] It can be understood that in the above optional implementation method, when the change amplitude value is less than the first amplitude value, it can be determined that the operation of the temperature control system under the current circumstances is relatively stable. Therefore, the upper limit value of the frequency range of the compressor operation and the lower limit value of the valve body opening can be maintained to maintain the stability of the temperature control system operation.

[0144] In some application scenarios of the above-mentioned optional implementation methods, after determining whether the change amplitude value is less than the first amplitude value, the current upper frequency limit value of the compressor can be determined as the target upper frequency limit value of the compressor when the change amplitude value is greater than or equal to the first amplitude value, and the sum of the current lower opening limit value of the valve body and the first opening can be determined as the target lower opening limit value of the valve body.

[0145] The first opening degree is greater than 0. The first opening degree may be a fixed value or a value that changes with the operating parameters of the temperature control system.

[0146] It can be understood that in the above application scenario, when the change amplitude value is greater than or equal to the first amplitude value, the stability of the temperature control system operation can be improved by maintaining the upper limit value of the frequency range of the compressor operation and increasing the lower limit value of the valve body opening.

[0147] In some cases of the above application scenarios, the first opening is determined in the following manner:

[0148] The first step is to determine the exhaust superheat of the temperature control system.

[0149] The exhaust superheat may be the difference between the compressor exhaust temperature and the saturation temperature corresponding to the exhaust pressure.

[0150] In the second step, a first opening degree is determined based on the magnitude relationship between the exhaust gas superheat degree and the preset temperature.

[0151] Here, the first opening degree may be determined by using a preset table or formula based on the magnitude relationship between the exhaust gas superheat degree and the preset temperature.

[0152] The preset temperature may be one or more preset temperature values.

[0153] It can be understood that in the above situation, the operating condition of the compressor can be measured by the exhaust superheat of the temperature control system. Thus, through the relationship between the exhaust superheat of the temperature control system and the preset temperature, the first opening that is more matched with the current operating condition of the compressor can be determined, thereby further improving the stability of the temperature control system operation.

[0154] In some examples of the above cases, the preset temperature includes a first temperature.

[0155] The first temperature may be a preset temperature value.

[0156] On this basis, the first opening degree may be determined in the following manner based on the magnitude relationship between the exhaust gas superheat and the preset temperature:

[0157] In the first step, it is determined whether the exhaust gas superheat is greater than or equal to a first temperature.

[0158] In a second step, when the exhaust gas superheat is greater than or equal to the first temperature, the first opening degree is determined to be a first value.

[0159] The first value may be a pre-set opening degree for a case where the exhaust gas superheat is greater than or equal to the first temperature.

[0160] It can be understood that in the above example, when the exhaust superheat is greater than or equal to the first temperature, the first opening can be determined as the first value. Therefore, when the exhaust superheat is too large (that is, the exhaust superheat is greater than or equal to the first temperature) and the above variation range is large, the lower limit of the opening of the valve body can be increased by the above first value, so as to improve the stability of the temperature control system operation.

[0161] In some embodiments of the above examples, the preset temperature also includes a second temperature.

[0162] The second temperature is lower than the first temperature.

[0163] On this basis, any of the following methods may be used to determine the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature:

[0164] Method 1: When the exhaust gas superheat is less than the second temperature, the first opening degree is determined to be a second value.

[0165] The second value is smaller than the first value.

[0166] Method 2: When the exhaust superheat is greater than or equal to the second temperature and the exhaust superheat is less than the first temperature, the first opening is determined as the most recently determined opening change, wherein the opening change is the first value or the second value.

[0167] It can be understood that in the above example, when the exhaust superheat is less than the second temperature, the lower limit value of the valve opening can be increased by a smaller opening (the second value is less than the first value); when the exhaust superheat is between the second temperature and the first temperature, the most recently determined opening change is maintained, thereby preventing the critical position from jumping and further improving the stability of the temperature control system operation.

[0168] In some optional implementations of this embodiment, the target operating threshold value includes a target frequency upper limit value of the compressor.

[0169] On this basis, the following method may be adopted: after determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side, the following steps may be further performed:

[0170] In the first step, when the first pressure value is less than the target pressure value, the current operating frequency of the compressor is determined.

[0171] The current operating frequency may be the frequency of the compressor when executing the first step.

[0172] In a second step, based on the current operating frequency and the current upper frequency limit of the compressor, a target upper frequency limit of the compressor is determined.

[0173] Here, a variety of methods may be used to determine the target frequency upper limit value of the compressor based on the current operating frequency and the current frequency upper limit value of the compressor.

[0174] As an example, a preset correspondence table or formula may be used to determine the target upper frequency limit value of the compressor based on the current operating frequency and the current upper frequency limit value of the compressor.

[0175] It can be understood that in the above optional implementation method, the operating condition of the compressor is measured based on the current operating frequency and the current frequency upper limit value of the compressor, and then the target frequency upper limit value of the compressor is determined according to the operating condition of the compressor, thereby further improving the stability of the operation of the temperature control system.

[0176] In some cases of the above optional implementations, any of the following methods may be used to determine the target frequency upper limit value of the compressor based on the current operating frequency and the current frequency upper limit value of the compressor:

[0177] Method 1: When the current operating frequency is equal to the current upper frequency limit of the compressor, the sum of the current upper frequency limit of the compressor and the first frequency is determined as the target upper frequency limit of the compressor.

[0178] The first frequency may be a preset frequency value. The first frequency is greater than 0.

[0179] Method 2: When the current operating frequency is less than the current upper frequency limit of the compressor, the current upper frequency limit of the compressor is determined as the target upper frequency limit of the compressor.

[0180] It can be understood that in the above case, when the current operating frequency is equal to the current upper frequency limit of the compressor, the frequency upper limit of the compressor can be increased to improve the stability of the temperature control system operation, thereby improving the temperature control comfort of the temperature control equipment; when the current operating frequency is less than the current frequency upper limit of the compressor, the frequency upper limit of the compressor can be maintained to maintain the stability of the temperature control system operation and the temperature control comfort.

[0181] It should be noted that, in addition to the above contents, this embodiment may also include Figure 1 The corresponding technical features described in the corresponding embodiments are realized Figure 1 For details, please refer to Figure 1 For the sake of brevity, the relevant description is not repeated here.

[0182] The control method of the temperature control system provided in the embodiment of the present application can more accurately determine the target operating threshold value that can make the temperature control system operate stably through the change amplitude value of the actual pressure value on the exhaust side. In this way, by controlling the operation of the temperature control system according to the target operating threshold value, the stability of the temperature control system can be further improved.

[0183] The following is an illustrative description of the embodiments of the present application, but it should be noted that the embodiments of the present application may have the features described below, but the following description does not constitute a limitation on the scope of protection of the embodiments of the present application.

[0184] In existing multi-split products (i.e. the temperature control equipment mentioned above, such as air conditioners), during heating operation, the high-temperature refrigerant reaches the indoor unit heat exchanger for heat exchange with the condenser, and is converted from gas to liquid. The liquid refrigerant will be stored in the indoor unit and will not participate in the system circulation, resulting in lower high pressure during unit operation and poor heating comfort. In order to avoid the problem of low system pressure and poor comfort due to excessive storage of refrigerant in the indoor unit, the electronic expansion valve (i.e. valve body) of the shut-down indoor unit in the conventional design system will have a certain opening to release the refrigerant stored in the indoor unit to increase the amount of refrigerant circulating in the system. At the same time, in order to avoid the problem of valve body over-adjustment due to single subcooling control, the maximum and minimum opening of the shut-down indoor unit valve body will also be limited based on the unit configuration conditions.

[0185] However, due to the complex piping environment of the multi-split system and the various startup configurations of the units, the traditional subcooling and fixed maximum / minimum opening methods cannot fully cope with complex application environments. According to after-sales service, the multi-split system has inappropriate valve opening control and excessive storage of refrigerant during operation, resulting in a continuous decrease in heating operation pressure, triggering the unit to continuously add additional capacity and frequent defrosting, which ultimately affects the user's heating operation experience.

[0186] This solution determines the difference between the current operating effect of the unit and the expected effect based on the unit's operating load, operating parameters, and operating time, and performs relevant optimization control on the unit's output (i.e., the operating frequency of the compressor) and the internal valve body, thereby achieving stable heating operation of the unit and improving user comfort. It can solve the problem of poor environmental adaptability of conventional multi-split valve body control during heating operation, resulting in excessive refrigerant storage in the unit, causing unstable heating operation and poor user comfort.

[0187] Before introducing this solution, the following technical terms are introduced:

[0188] 1) System pressure value Pf (high pressure on the exhaust side of the compressor, the pressure value detected by the sensor, i.e. the first pressure value mentioned above): the system pressure value detected by the sensor of the unit. When the heating mode is running, it refers to the system high pressure pressure value. When the conventional multi-split heating control is performed, the goal is to control the high pressure pressure value within a certain pressure range, which reflects the heating effect of the unit.

[0189] 2) Unit output capacity ratio value n (output capacity rate): the current actual output capacity (the actual output capacity of the air-conditioning unit can be considered as the operating frequency of the variable frequency compressor according to the conventional comfort conditions, and the two are in an equal relationship. That is, when the unit is operating normally, there will be a certain pressure and temperature value to define the unit to meet the target requirements. After the unit is running, the compressor frequency will be operated according to the pressure range value. When a certain pressure value is actually reached, the corresponding compressor output capacity or frequency of the unit) is the ratio of the unit's target capacity (such as the target frequency). It reflects the amplitude of the unit's output. Under normal circumstances, when the multi-split system takes pressure as the target, its actual output value will be adjusted. In order to ensure the actual operating effect of the unit, there will be a situation where the output is greater than the proportional relationship.

[0190] Target capacity: The corresponding compressor operating frequency when the high pressure value is within the above pressure range.

[0191] This solution can correct the target output value of the unit according to the pipe length (corresponding to the above-mentioned exhaust pipe length), and at the same time assist in the control of compressor output and valve body refrigerant. By automatically correcting the minimum opening of the system indoor unit valve body (opening larger or reducing it), the amount of refrigerant in the unit operation process is changed to avoid the problem of poor unit comfort caused by excessive control of the valve body and the use of compressor compensation over-output.

[0192] Among them, because there will be a certain loss in the pipe length, the pressure value sampling point is located on the side of the external unit. According to the different losses of different pipe lengths, the system comfort pressure is corrected or compensated, that is, assuming that the high pressure output of the standard pipe is considered to be a, if the corresponding loss of the pipe length is b, then the target comfort pressure should be a+b. a is the standard pressure value considered by the standard pipe length, which is the value used for comparison of the pressure value collected at the sampling point.

[0193] See below Figure 3 , Figure 3 A flow chart of another method for controlling a temperature control system provided in an embodiment of the present application.

[0194] 1. If it is detected that the user is turning on the heating, the unit will enter the heating comfort stability control detection control:

[0195] 1.1 The unit detects and collects the system operation duration t, the system pressure value Pf (i.e., the above-mentioned first pressure value), and the unit output capacity value ratio n. Based on the relationship between the unit operation pressure (at the same sampling position as Pf) and the target pressure (the target pressure value refers to the relevant content in Figure 2, which is a parameter related to the pipe length and the reference target pressure value. The reference target value remains unchanged, but relevant corrections will be made according to different pipe lengths) and the change of the system pressure within a certain period of time (to determine whether the system is in steady-state control), both are comprehensively considered to determine the current maximum output ratio n of the unit and the minimum valve body control steps (i.e., the lower limit value of the target opening of the above-mentioned valve body), and the control is as follows:

[0196] a. If it is detected that within t min (minutes) of the unit operation, the system pressure (i.e., the above-mentioned first pressure value) Pf ≥ the target pressure value Py, and Pf1 - Pft (i.e., the above-mentioned change amplitude value) < a (i.e., the above-mentioned first amplitude value), then the unit maintains the current maximum output load rate (i.e., maintains the current upper limit value of the compressor operation frequency), and maintains the current minimum number of steps control for the indoor unit valve body. Pf1 and Pft refer to the pressure values at different times. Pf1 is the first set of pressure values recorded after the unit starts running, and Pft is the pressure value of the system after t time. The a value is a suitable range of the difference for judging the pressure change after running for a period of time. When the pressure value is considered to be less than this suitable range, the unit is in a stable operation state.

[0197] b. If it is detected that within t min of the unit operation, the system pressure Pf ≥ the target pressure value Py, and Pf1 - Pft ≥ a, then the unit maintains the current maximum output load rate operation, and the minimum number of steps of the indoor unit increases by B on the basis of the current indoor unit valve body. The value-taking method of B is shown later.

[0198] c. If it is detected that within t min of the unit operation, the system pressure Pf < the target pressure value Py, then judge the system output capacity rate n. If the current output capacity rate n is the current maximum capacity output limit value - before adjustment, then the unit's capacity output rate in the next cycle increases by C (i.e., the above-mentioned first frequency). The value-taking method of C is shown later; if the current output capacity rate n < the maximum capacity output limit value / target frequency, then the unit maintains the current maximum output load rate operation, and the minimum number of steps of the indoor unit valve body maintains the current minimum number of steps control.

[0199] 2. The target pressure value Py = f(actual unit connecting pipe length l, predetermined reference target pressure value Pb).

[0200] Among them, Pb obtains the initial target value based on the comfortable environmental conditions. f() represents a functional relationship. The actual pipe length l: is used to correct the target pressure value based on the standard pipe length value. That is, when the pipe length is the reference pipe length, the correction value is 0. If the pipe length increases, the corrected value will increase; if the pipe length decreases, the corrected pressure value will decrease.

[0201] 3. The current valve correction coefficient B is the valve correction coefficient according to the change of the unit exhaust superheat; if the exhaust superheat ≥ c (that is, the first temperature mentioned above), the correction system B takes the value x; if the exhaust superheat < d (that is, the second temperature mentioned above), the correction system B takes the value y, if d≤exhaust superheat < c, then maintain the last control, and enter the value ≥ c for the first time (that is, the correction system B takes the value x). Among them, x is greater than y. c represents the reference value of the exhaust superheat range.

[0202] Therefore, by determining the valve body correction coefficient B in the above manner, the critical position jump can be prevented.

[0203] It should be noted that, in addition to the contents recorded above, this embodiment may also include the technical features described in the above embodiments, so as to achieve the technical effects of the control method of the temperature control system shown above. Please refer to the above description for details. For the sake of brevity, it will not be repeated here.

[0204] This solution determines the difference between the current operating effect of the unit and the expected effect according to the operating load, operating parameters, and operating time of the unit (such as an air-conditioning unit), and performs relevant optimization control on the unit's output and internal valve body, thereby automatically adjusting the unit's output limit and valve body control to adapt to the use of the unit in more situations and ensure the stability and comfort of the user's heating operation.

[0205] Figure 4 A schematic diagram of the structure of a control device for a temperature control system provided in an embodiment of the present application. Specifically comprising:

[0206] An acquisition unit 401 is configured to acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode;

[0207] A first determining unit 402 is used to determine a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system;

[0208] The control unit 403 is used to control the operation of the temperature control system according to the target operation threshold value.

[0209] In a possible implementation manner, determining a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side includes:

[0210] determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side;

[0211] When the first pressure value is greater than or equal to the target pressure value, determining a change amplitude value of the actual pressure value at the exhaust side;

[0212] Based on the change amplitude value, a target operation threshold value of the temperature control system is determined.

[0213] In a possible implementation manner, the target operation threshold value includes: a target frequency upper limit value of the compressor and a target opening lower limit value of the valve body; and

[0214] The determining, based on the change amplitude value, a target operation threshold value of the temperature control system includes:

[0215] Determining whether the change amplitude value is less than the first amplitude value;

[0216] When the change amplitude value is smaller than the first amplitude value, the current frequency upper limit value of the compressor is determined as the target frequency upper limit value of the compressor, and the current opening lower limit value of the valve body is determined as the target opening lower limit value of the valve body.

[0217] In a possible implementation manner, after determining whether the change amplitude value is less than the first amplitude value, the device further includes:

[0218] The second determination unit (not shown in the figure) is used to determine the current upper frequency limit value of the compressor as the target upper frequency limit value of the compressor when the change amplitude value is greater than or equal to the first amplitude value, and to determine the sum of the current lower opening limit value of the valve body and the first opening as the target lower opening limit value of the valve body.

[0219] In a possible implementation manner, the first opening is determined in the following manner:

[0220] determining an exhaust superheat of the temperature control system;

[0221] Based on the magnitude relationship between the exhaust gas superheat and the preset temperature, a first opening degree is determined. In a possible implementation manner, the preset temperature includes a first temperature; and

[0222] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature includes:

[0223] determining whether the exhaust gas superheat is greater than or equal to a first temperature;

[0224] When the exhaust gas superheat degree is greater than or equal to the first temperature, the first opening degree is determined to be a first value.

[0225] In a possible implementation manner, the preset temperature further includes a second temperature, and the second temperature is lower than the first temperature; and

[0226] The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature further includes one of the following:

[0227] When the exhaust gas superheat is less than the second temperature, the first opening is determined to be a second value, wherein the second value is less than the first value; or

[0228] When the exhaust superheat is greater than or equal to the second temperature and the exhaust superheat is less than the first temperature, the first opening is determined as the most recently determined opening change, wherein the opening change is the first value or the second value.

[0229] In a possible implementation manner, the target operation threshold value includes a target frequency upper limit value of the compressor; and

[0230] After determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side, the device further includes:

[0231] a third determining unit (not shown in the figure), configured to determine a current operating frequency of the compressor when the first pressure value is less than the target pressure value;

[0232] A fourth determining unit (not shown in the figure) is used to determine a target frequency upper limit value of the compressor based on the current operating frequency and a current frequency upper limit value of the compressor.

[0233] In a possible implementation manner, determining the target upper frequency limit value of the compressor based on the current operating frequency and the current upper frequency limit value of the compressor includes one of the following:

[0234] In the case where the current operating frequency is equal to the current frequency upper limit value of the compressor, the sum of the current frequency upper limit value of the compressor and the first frequency is determined as the target frequency upper limit value of the compressor; or,

[0235] In a case where the current operating frequency is less than a current upper frequency limit value of the compressor, the current upper frequency limit value of the compressor is determined as a target upper frequency limit value of the compressor.

[0236] In a possible implementation manner, the target pressure value is determined in the following manner:

[0237] Determine the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, and a reference pressure value; wherein the reference pressure value is: the pressure value at the detection position when the length of the exhaust pipe between the exhaust position and the detection position is the reference length;

[0238] The target pressure value is determined based on the exhaust pipe length and the reference pressure value.

[0239] The control device of the temperature control system provided in this embodiment can be as follows Figure 4 The control device of the temperature control system shown in can execute all the steps of the control methods of the temperature control systems described above, thereby achieving the technical effects of the control methods of the temperature control systems described above. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0240] Figure 5 A schematic diagram of a temperature control system provided in an embodiment of the present application is shown in FIG. Figure 5 The temperature control system 500 shown includes: at least one processor 501 and a memory 502. The various components in the temperature control system 500 are coupled together.

[0241] It can be understood that the memory 502 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory 502 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0242] In some implementations, the memory 502 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof.

[0243] In this embodiment, by calling the program or instruction stored in the memory 502, specifically, the program or instruction stored in the application, the processor 501 is used to execute the method steps provided by each method embodiment, for example, including:

[0244] Acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode;

[0245] Based on the first pressure value and the target pressure value of the exhaust side, a target operating threshold value of the temperature control system is determined; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system;

[0246] The temperature control system is controlled to operate according to the target operating threshold value.

[0247] The method disclosed in the above embodiment of the present application can be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 501. The above processor 501 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and completes the steps of the above method in combination with its hardware.

[0248] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the above functions of the present application, or a combination thereof.

[0249] For software implementation, the technology described above in this article can be implemented by a unit that performs the functions described above in this article. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0250] The temperature control system provided in this embodiment can be as follows Figure 5 The temperature control system shown in can execute all the steps of the control methods of the temperature control systems described above, thereby achieving the technical effects of the control methods of the temperature control systems described above. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0251] The embodiment of the present application also provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0252] When one or more programs in the storage medium can be executed by one or more processors, the control method of the temperature control system executed on the temperature control system side can be implemented.

[0253] The processor is used to execute the control program of the temperature control system stored in the memory to implement the following steps of the temperature control system control method executed on the temperature control system side:

[0254] Acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode;

[0255] Based on the first pressure value and the target pressure value of the exhaust side, a target operating threshold value of the temperature control system is determined; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system;

[0256] The temperature control system is controlled to operate according to the target operating threshold value.

[0257] The professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0258] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0259] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0260] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A control method for a temperature control system, characterized in that: The method comprises: Acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode; Based on the first pressure value and the target pressure value of the exhaust side, a target operating threshold value of the temperature control system is determined; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, and the valve body is used to control the refrigerant circulation amount of the temperature control system; The temperature control system is controlled to operate according to the target operating threshold value.

2. The method according to claim 1, characterized in that: The determining a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side includes: determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side; When the first pressure value is greater than or equal to the target pressure value, determining a change amplitude value of the actual pressure value at the exhaust side; Based on the change amplitude value, a target operation threshold value of the temperature control system is determined.

3. The method according to claim 2, characterized in that The target operation threshold value includes: a target frequency upper limit value of the compressor and a target opening lower limit value of the valve body; and The determining, based on the change amplitude value, a target operation threshold value of the temperature control system includes: Determining whether the change amplitude value is less than the first amplitude value; When the change amplitude value is smaller than the first amplitude value, the current frequency upper limit value of the compressor is determined as the target frequency upper limit value of the compressor, and the current opening lower limit value of the valve body is determined as the target opening lower limit value of the valve body.

4. The method according to claim 3, characterized in that After determining whether the change amplitude value is less than the first amplitude value, the method further includes: When the change amplitude value is greater than or equal to the first amplitude value, the current upper frequency limit value of the compressor is determined as the target upper frequency limit value of the compressor, and the sum of the current lower opening limit value of the valve body and the first opening is determined as the target lower opening limit value of the valve body.

5. The method according to claim 4, characterized in that The first opening is determined in the following manner: determining an exhaust superheat of the temperature control system; The first opening degree is determined based on the magnitude relationship between the exhaust gas superheat degree and the preset temperature.

6. The method according to claim 5, characterized in that The preset temperature includes a first temperature; as well as The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature includes: determining whether the exhaust gas superheat is greater than or equal to a first temperature; When the exhaust gas superheat degree is greater than or equal to the first temperature, the first opening degree is determined to be a first value.

7. The method according to claim 6, characterized in that The preset temperature further includes a second temperature, the second temperature being lower than the first temperature; and The determining of the first opening degree based on the magnitude relationship between the exhaust gas superheat and the preset temperature further includes one of the following: When the exhaust gas superheat is less than the second temperature, the first opening is determined to be a second value, wherein the second value is less than the first value; or When the exhaust superheat is greater than or equal to the second temperature and the exhaust superheat is less than the first temperature, the first opening is determined as the most recently determined opening change, wherein the opening change is the first value or the second value.

8. The method according to claim 2, characterized in that: The target operation threshold value includes a target frequency upper limit value of the compressor; as well as After determining whether the first pressure value is greater than or equal to the target pressure value on the exhaust side, the method further includes: When the first pressure value is less than the target pressure value, determining a current operating frequency of the compressor; A target upper frequency limit of the compressor is determined based on the current operating frequency and a current upper frequency limit of the compressor.

9. The method according to claim 8, characterized in that The determining of the target frequency upper limit value of the compressor based on the current operating frequency and the current frequency upper limit value of the compressor includes one of the following: In a case where the current operating frequency is equal to the current upper frequency limit value of the compressor, determining the sum of the current upper frequency limit value of the compressor and the first frequency as the target upper frequency limit value of the compressor; or, In a case where the current operating frequency is less than a current upper frequency limit value of the compressor, the current upper frequency limit value of the compressor is determined as a target upper frequency limit value of the compressor.

10. The method according to any one of claims 1 to 9, characterized in that: The target pressure value is determined in the following manner: Determine the exhaust pipe length between the exhaust position on the exhaust side and the detection position of the actual pressure value, and a reference pressure value; wherein the reference pressure value is: the pressure value at the detection position when the length of the exhaust pipe between the exhaust position and the detection position is the reference length; The target pressure value is determined based on the exhaust pipe length and the reference pressure value.

11. A control device for a temperature control system, characterized in that: The device comprises: An acquisition unit, configured to acquire a first pressure value; wherein the first pressure value is: an actual pressure value on the exhaust side of the compressor of the temperature control system when the temperature control system is in a heating mode; a first determining unit, configured to determine a target operating threshold value of the temperature control system based on the first pressure value and the target pressure value of the exhaust side; the target operating threshold value includes at least one of the following: a target frequency upper limit value of the compressor, a target opening lower limit value of a valve body, the valve body being used to control a refrigerant circulation amount of the temperature control system; A control unit is used to control the operation of the temperature control system according to the target operation threshold value.

12. A temperature control system, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program stored in the memory, and when the computer program is executed, the control method of the temperature control system of any one of claims 1 to 10 is implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the temperature control system according to any one of claims 1 to 10 is implemented.

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