Heat pump energy-saving group control method and heat pump system

Abstract

The invention relates to the technical field of heat pumps, in particular to a heat pump energy-saving group control method and a heat pump system. The heat pump energy-saving group control method comprises the following steps: an information acquisition step: acquiring placement position information of a heat pump unit; and a grouping step, specifically, the heat pump units are grouped according to the placement position information of the heat pump units, the heat pump units which are not adjacent in the transverse direction and the longitudinal direction are divided into the same mother group, and at least two mother groups which are not adjacent to each other are obtained. And a loading and unloading control step: carrying out loading and unloading control on the heat pump unit in one mother group according to the loading and unloading requirements. The heat pump units are divided into the main units which are not adjacent to each other, so that the problem of airflow interference when the adjacent heat pump units operate at the same time is effectively avoided, airflow distribution is more uniform, mutual interference is reduced, mutual influence between the adjacent heat pump units is reduced, the phenomenon of frequent defrosting of the heat pump units is reduced, and the heat exchange efficiency and the energy efficiency ratio of the heat pump units are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump group control, and particularly to a heat pump energy-saving group control method and a heat pump system. Background Art

[0002] Currently, in centralized heating projects, air source heat pump units are usually placed centrally in multiple units. However, there are many problems with the existing heat pump unit group control methods. The existing group control methods only record the operating time of different units and adjust the on-off priority of each unit according to the operating time to balance the operating life of the units. However, this group control method ignores the mutual influence when the units are placed centrally and the actual influence of the installation space on their operation. Specifically, in actual operation, when adjacent units operate simultaneously, the heat exchange efficiency decreases due to the mutual interference of the airflows. During the defrosting process, there is mutual interference, resulting in frequent frosting, which seriously affects the operating energy efficiency ratio of the units. Especially in an environment with high humidity, this problem is more prominent. The traditional group control method will cause the water vapor generated by the defrosting of adjacent units to be inhaled by other units again, so that the units next to the units that have just completed defrosting enter the defrosting state again, causing frequent frosting and further reducing the energy efficiency ratio.

[0003] Therefore, there is an urgent need to design a heat pump energy-saving group control method and a heat pump system to solve the above technical problems. Summary of the Invention

[0004] The first object of the present invention is to propose a heat pump energy-saving group control method, which reduces the mutual influence between heat pump units, reduces the phenomenon of frequent defrosting of heat pump units, and improves the heat exchange efficiency and operating energy efficiency ratio.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The present invention provides a heat pump energy-saving group control method, including:

[0007] Obtaining the placement position information of the heat pump units;

[0008] Grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same parent group to obtain at least two non-adjacent parent groups;

[0009] Performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements.

[0010] As an optional technical solution of the heat pump energy-saving group control method, the step of obtaining the placement position information of the heat pump units includes:

[0011] Displaying a pre-stored standard heat pump unit placement layout library to the user through a line controller;

[0012] Receive the target layout diagram selected by the user from the gallery, which is consistent with the actual installation site, and the user's marking operation on the actual installation position of the heat pump units, and obtain the specific placement position information of each heat pump unit.

[0013] As an alternative technical solution of a heat pump energy-saving group control method, the step of grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same parent group to obtain at least two non-adjacent parent groups includes:

[0014] According to the placement position information of the heat pump units, construct a coordinate system for the positions of the heat pump units. Taking any one heat pump unit as the origin, the direction of the row where the heat pump unit is located as the horizontal axis, and the direction of the column where the heat pump unit is located as the vertical axis, assign a unique two-dimensional coordinate to each heat pump unit;

[0015] According to the coordinate positions of all heat pump units, divide the heat pump units that are not adjacent horizontally and vertically into the same group to form a parent group; the number of parent groups is at least two, and the heat pump units within each parent group are not adjacent to each other horizontally and vertically.

[0016] As an alternative technical solution of a heat pump energy-saving group control method, the step of performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements further includes:

[0017] When the total operating times of the parent groups are equal or the difference is within a preset time threshold, further compare the energy consumption indexes of each parent group in a past preset time period; select the parent group with the lowest energy consumption index for the loading operation, or select the parent group with the highest energy consumption index for the unloading operation; the energy consumption index is comprehensively calculated based on the power consumption, heating output, and operating time of the heat pump units;

[0018] And ω1 + ω2 = 1;

[0019] Wherein, ECI represents the energy consumption index;

[0020] E represents the power consumption;

[0021] ω1 represents the preset weight of the power consumption;

[0022] H represents the heating output;

[0023] ω2 represents the preset weight of the heating output;

[0024] t represents the operating time.

[0025] As an alternative technical solution of a heat pump energy-saving group control method, the step of grouping the heat pump units according to the placement position information of the heat pump units, dividing the heat pump units that are not adjacent horizontally and vertically into the same parent group, and obtaining at least two non-adjacent parent groups further includes:

[0026] Further subdivide each parent group according to the position distribution of the heat pump units within the parent group to form multiple subgroups, and the heat pump units within each subgroup are at least separated by one heat pump unit in the horizontal direction and the vertical direction.

[0027] As an alternative technical solution of a heat pump energy-saving group control method, the step of performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements includes:

[0028] When a loading demand is received, first compare the total operating time of each parent group, and select the parent group with the shortest total operating time; within the selected parent group, compare the operating time of the subgroups within the selected parent group, and the shorter the operating time, the higher the priority. Load the heat pump units within the subgroups in the order of the subgroup priorities.

[0029] When an unloading demand is received, first compare the total operating time of each parent group, and select the parent group with the longest total operating time; within the selected parent group, compare the operating time of the subgroups within the selected parent group, and the longer the operating time, the higher the priority. Unload the heat pump units within the subgroups in the order of the subgroup priorities.

[0030] As an alternative technical solution of a heat pump energy-saving group control method, a preset time interval is set after each loading or unloading operation, and the preset time is set to 15 minutes - 30 minutes.

[0031] As an alternative technical solution of a heat pump energy-saving group control method, the step of performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements further includes:

[0032] For subgroups with the same priority, load the heat pump units in the order from the outside to the inside according to the placement position of the heat pump units.

[0033] For subgroups with the same priority, unload the heat pump units in the order from the inside to the outside according to the placement position of the heat pump units.

[0034] As an alternative technical solution of a heat pump energy-saving group control method, the step of performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements further includes:

[0035] During the process of loading the heat pump unit, if the target heat pump unit is in the defrosting process, add the target heat pump unit to the waiting queue and wait until the defrosting process is completed before loading; if the waiting time exceeds the preset waiting time, select the heat pump unit with the next priority for loading and mark the heat pump units that are not loaded in time. After the defrosting process of these units is completed, decide whether to perform a supplementary loading operation according to the current load situation of the heat pump system.

[0036] The second object of the present invention is to provide a heat pump system, which has a high heat exchange efficiency and operating energy efficiency ratio, and reduces the operating cost.

[0037] To achieve this purpose, the present invention adopts the following technical solutions:

[0038] The present invention provides a heat pump system, which includes a controller and multiple heat pump units. The controller is used to execute the heat pump energy-saving group control method described in any of the above optional technical solutions and perform loading and unloading control on the multiple heat pump units.

[0039] The beneficial effects of the present invention at least include:

[0040] The present invention provides a heat pump energy-saving group control method, which includes the following steps: an information acquisition step of acquiring the placement position information of the heat pump units; a grouping step of grouping the heat pump units according to the placement position information of the heat pump units, dividing the heat pump units that are not adjacent horizontally and vertically into the same parent group to obtain at least two non-adjacent parent groups; a loading and unloading control step of performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements. By dividing the heat pump units into non-adjacent parent groups, the problem of air flow interference when adjacent heat pump units operate simultaneously is effectively avoided, the air flow distribution is more uniform, the mutual interference is reduced, the mutual influence between adjacent heat pump units is reduced, the phenomenon of frequent defrosting of the heat pump units is reduced, and the heat exchange efficiency and energy efficiency ratio of the heat pump units are improved.

[0041] The present invention also provides a heat pump system, which has a high heat exchange efficiency and operating energy efficiency ratio, and reduces the operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0043] Figure 1 It is a schematic flow chart of the heat pump energy-saving group control method provided by the embodiment of the present invention. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0045] Therefore, the detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention 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 invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0048] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0050] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only for explaining the present invention and should not be construed as limiting the present invention.

[0051] This embodiment provides a heat pump energy-saving group control method to reduce the mutual influence between heat pump units, reduce the phenomenon of frequent defrosting of heat pump units, and improve the heat exchange efficiency and operating energy efficiency ratio.

[0052] As Figure 1 shown, the heat pump energy-saving group control method includes the following steps:

[0053] Information acquisition step: acquiring the placement position information of the heat pump units.

[0054] Grouping step: grouping the heat pump units according to the placement position information of the heat pump units, dividing the heat pump units that are not adjacent both horizontally and vertically into the same parent group, and obtaining at least two non-adjacent parent groups.

[0055] Loading and unloading control step: performing loading and unloading control on the heat pump units in one of the parent groups according to the loading and unloading requirements.

[0056] Specifically, for example, in a central heating project, there are 21 heat pump units arranged in a 7-row and 3-column manner. The placement position information of each heat pump unit is acquired. According to this information, the heat pump units are divided into two parent groups: Parent Group A and Parent Group B. The specific grouping method is as follows: the odd-column heat pump units in the first row and the third row are divided into Parent Group A, and the even-column heat pump units are divided into Parent Group B; for the heat pump units in the second row and the fourth row, it is the opposite, that is, the odd-column heat pump units are divided into Parent Group B, and the even-column heat pump units are divided into Parent Group A. This ensures that the heat pump units within the same parent group are not adjacent both horizontally and vertically.

[0057] When the heat pump system receives a loading demand, it selects the mother group with a shorter total operating time for loading according to the preset rules. Suppose the total operating time of mother group A is 80 hours and that of mother group B is 100 hours, then mother group A is preferentially loaded. Similarly, when the heat pump system receives an unloading demand, it preferentially unloads the mother group with a longer total operating time.

[0058] By dividing the heat pump units into non-adjacent mother groups, the problem of air flow interference when adjacent heat pump units operate simultaneously is effectively avoided, the air flow distribution is more uniform, the mutual interference is reduced, the mutual influence between adjacent heat pump units is decreased, the phenomenon of frequent defrosting of the heat pump units is reduced, and the heat exchange efficiency and coefficient of performance (COP) of the heat pump units are improved.

[0059] In some alternative embodiments, the step of obtaining the placement position information of the heat pump units includes displaying a pre-stored standard heat pump unit placement layout library to the user through a line controller; receiving the target placement layout diagram (such as Table 1) selected by the user from the library that is consistent with the actual installation site, and the marking operation of the user on the actual installation position of the heat pump units, so as to obtain the specific placement position information of each heat pump unit. The method of selecting the standard layout diagram by using the line controller greatly simplifies the acquisition process of the position information of the heat pump units. In this embodiment, it only takes 3 minutes for the user to complete the layout diagram selection and position marking. Compared with the method of manually inputting the position coordinates, the method of selecting the standard layout diagram by using the line controller can save a great deal of time, which not only improves the deployment efficiency of the heat pump system, but also reduces the risk of grouping errors caused by manual input errors, ensuring the accuracy of the subsequent group control method.

[0060] Table 1

[0061]

[0062] Specifically, the heat pump units are grouped according to the placement position information of the heat pump units, and the heat pump units that are not adjacent horizontally and vertically are divided into the same mother group to obtain at least two non-adjacent mother groups. This step is specifically as follows: according to the placement position information of the heat pump units, a position coordinate system of the heat pump units is constructed. Taking any one heat pump unit as the origin, the direction of the row where the heat pump unit is located as the horizontal axis, and the direction of the column where the heat pump unit is located as the vertical axis, a unique two-dimensional coordinate is assigned to each heat pump unit. According to the coordinate positions of all the heat pump units, the heat pump units that are not adjacent horizontally and vertically are divided into the same group to form a mother group; the number of mother groups is at least two, and the heat pump units within each mother group are not adjacent to each other horizontally and vertically.

[0063] Exemplarily, taking the unit in the upper left corner as the origin, with the direction of its row as the horizontal axis and the direction of its column as the vertical axis, a unique two-dimensional coordinate is assigned to each heat pump unit, such as (1, 1), (1, 2), (1, 3), and so on. According to these coordinates, the heat pump units that are not adjacent horizontally and vertically are divided into the same mother group, and finally mother group A and mother group B are formed (as shown in Tables 2 to 4). By constructing a coordinate system and grouping based on the coordinates, the accuracy and rationality of the grouping are ensured. The problem of operation interference of heat pump units caused by incorrect position judgment is avoided. This coordinate-based grouping method can also provide a solid foundation for subsequent subgroup subdivision and loading / unloading control logic.

[0064] It can be understood that in Table 2, the user groups the selected 7-row and 3-column target heat pump units and assigns two-dimensional coordinates to form mother group A and mother group B. Table 3 shows the coordinate positions of each heat pump unit in mother group A, and Table 4 shows the coordinate positions of each heat pump unit in mother group B.

[0065] Table 2

[0066] A(1，1) B(1，2) A(1，3) B(2，1) A(2，2) B(2，3) A(3，1) B(3，2) A(3，3) B(4，1) A(4，2) B(4，3) A(5，1) B(5，2) A(5，3) B(6，1) A(6，2) B(6，3) A(7，1) B(7，2) A(7，3)

[0067] Table 3

[0068] A(1，1) A(1，3) A(2，2) A(3，1) A(3，3) A(4，2) A(5，1) A(5，3) A(6，2) A(7，1) A(7，3)

[0069] Table 4

[0070] B(1，2) B(2，1) B(2，3) B(3，2) B(4，1) B(4，3) B(5，2) B(6，1) B(6，3) B(7，2)

[0071] In this embodiment, the steps of performing loading and unloading control on the heat pump units in one of the mother groups according to the loading and unloading requirements are specifically as follows: when the total operating time of the mother group is equal or the difference is within a preset time threshold (such as 8 hours), further compare the energy consumption indexes (ECI) of each mother group in the past preset time period; select the mother group with the lowest energy consumption index for loading operation, or select the mother group with the highest energy consumption index for unloading operation; the energy consumption index is comprehensively calculated based on the power consumption, heating output, and operating time of the heat pump unit. The calculation method of the energy consumption index is as follows:

[0072] And ω1 + ω2 = 1.

[0073] Wherein, ECI represents the energy consumption index; E represents the power consumption; ω1 represents the preset weight of the power consumption; such as ω1 = 0.6; H represents the heating output; ω2 represents the preset weight of the heating output; such as ω2 = 0.4; t represents the operating time.

[0074] Assume the ECI of mother group A is 2.5 and that of mother group B is 3.0. Then, select mother group A with a lower ECI for the loading operation. Make the loading decision by comparing the ECI values of mother group A and mother group B, so that when the heat pump system meets the same heating demand, the mother group with a lower ECI can achieve a better balance between energy consumption and heating output, operate more efficiently, and thus reduce energy consumption.

[0075] In this embodiment, when grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same mother group to obtain at least two non-adjacent mother groups, the step further includes further dividing each mother group according to the position distribution of the heat pump units within the mother group to form multiple subgroups, and the heat pump units within each subgroup are at least one heat pump unit apart in the horizontal direction and the vertical direction.

[0076] Specifically, after grouping the mother groups, further divide each mother group to form multiple subgroups. Taking mother group A as an example, according to the position distribution of the heat pump units within mother group A, divide it into four subgroups: A1, A2, A3, and A4. The heat pump units within each subgroup are at least one heat pump unit apart in the horizontal direction and the vertical direction. Subgroup A1 includes the heat pump units with coordinates (1, 1), (3, 3), (5, 1), and (7, 3), a total of 4 units. Subgroup A2 includes the heat pump units with coordinates (3, 1), (5, 3), and (7, 1), a total of 3 units. Subgroup A3 includes the heat pump units with coordinates (1, 3) and (4, 3), a total of 2 units. Subgroup A4 includes the heat pump units with coordinates (2, 2) and (6, 2), a total of 2 units. Subgroup B1 includes the heat pump units with coordinates (2, 1), (4, 3), and (6, 1), a total of 3 units. Subgroup B2 includes the heat pump units with coordinates (2, 3), (4, 1), and (6, 3), a total of 3 units. Subgroup B3 includes the heat pump units with coordinates (1, 2) and (5, 2), a total of 2 units. Subgroup B4 includes the heat pump units with coordinates (3, 2) and (7, 2), a total of 2 units.

[0077] It can be understood that Table 5 shows the coordinate positions of the heat pump units in the four subgroups A1, A2, A3, and A4; Table 6 shows the coordinate positions of the heat pump units in the four subgroups B1, B2, B3, and B4.

[0078] Table 5

[0079] A1(1，1) A3(1，3) A4(2，2) A2(3，1) A1(3，3) A3(4，2) A1(5，1) A2(5，3) A4(6，2) A2(7，1) A1(7，3)

[0080] Table 6

[0081] B3(1，2) B1(2，1) B2(2，3) B4(3，2) B2(4，1) B1(4，3) B3(5，2) B1(6，1) B2(6，3) B4(7，2)

[0082] The subdivision of subgroups further optimizes the loading and unloading control method, making the loading and unloading operations more refined. In this embodiment, after the subgroup subdivision, the operating time distribution of the heat pump units is more uniform, effectively reducing the mutual interference between the heat pump units and further improving the operating efficiency of the heat pump system.

[0083] In this embodiment, the steps of controlling the loading and unloading of the heat pump units in one of the parent groups according to the loading and unloading requirements include: when a loading requirement is received, first compare the total operating times of each parent group, and select the parent group with the shortest total operating time; within the selected parent group, compare the operating times of the subgroups in the selected parent group, and the shorter the operating time, the higher the priority, and load the heat pump units in the subgroups in the order of the subgroup priorities. When an unloading requirement is received, first compare the total operating times of each parent group, and select the parent group with the longest total operating time; within the selected parent group, compare the operating times of the subgroups in the selected parent group, and the longer the operating time, the higher the priority, and unload the heat pump units in the subgroups in the order of the subgroup priorities.

[0084] Specifically, when the heat pump system receives a loading requirement, first compare the total operating times of Group A and Group B. Assume that the total operating time of Group A is 80 hours and that of Group B is 120 hours, then Group A is preferentially selected for loading. Inside Group A, compare the operating times of each subgroup. Assume that the operating time of Subgroup A1 is 20 hours, A2 is 30 hours, A3 is 40 hours, and A4 is 50 hours, then load the units in Subgroups A1, A2, A3, and A4 in the order of priority. After loading one subgroup each time, wait for a preset time before loading the next subgroup. The preset waiting time can be set to 15 minutes - 30 minutes. For the unloading operation, also compare the total operating times of the parent groups and preferentially unload the parent group with the longest total operating time. Inside the selected parent group, unload in the order of the subgroup operating times from long to short.

[0085] The priority sorting strategy during loading and unloading in this embodiment ensures that the heat pump system can quickly respond to load changes while taking into account the balanced operation of the heat pump units. At the same time, compared with the traditional technology, the response time of the loading and unloading operations in this embodiment is shortened to about 2 minutes, which is about 60% faster than the heat pump system without the priority strategy. At the same time, the operating times of the heat pump units are more balanced, and the gap between the longest operating time and the shortest operating time is reduced from the original 50 hours to 15 hours, effectively extending the service life of the heat pump units.

[0086] Furthermore, after each loading or unloading operation in this embodiment, a preset time interval is set, which is set to 15 minutes - 30 minutes. For example, it can be set to 15 minutes, 20 minutes, 25 minutes, 30 minutes, etc. The setting of the preset time interval allows the heat pump system to reach a new equilibrium state after each loading or unloading, reducing parameter fluctuations caused by frequent operations, effectively avoiding the impact of frequent operations on the stability of the heat pump system, and improving the stability of the heat pump system operation.

[0087] In some alternative embodiments, the step of controlling the loading and unloading of the heat pump units in one of the parent groups according to the loading and unloading requirements further includes, for subgroups with the same priority, loading the heat pump units in the order from the outside to the inside according to the placement position of the heat pump units. This enables the outer heat pump units to start working first and preferentially heat and circulate the external air. This can effectively perform heat exchange on the external environment first, optimize the air flow organization of the entire space, make the heat more evenly distributed throughout the area, reduce the uneven distribution of heat, and improve the heating efficiency and effect. For subgroups with the same priority, the heat pump units are unloaded in the order from the inside to the outside according to the placement position of the heat pump units. This can preferentially reduce the operation of the inner heat pump units. The inner heat pump units are usually in a relatively core position in the entire heat pump system, and their operating status has a greater impact on the stability of the heat pump system. Gradually unloading these heat pump units can gradually reduce the load of the heat pump system and reduce the impact on the heat pump system caused by suddenly unloading a large number of heat pump units, maintaining the stable operation of the heat pump system.

[0088] In some alternative embodiments, controlling the loading and unloading of the heat pump units in one of the parent groups according to the loading and unloading requirements further includes the following steps.

[0089] During the process of loading the heat pump units, if the target heat pump unit is in the defrosting process, the target heat pump unit is added to the waiting queue and loaded after the defrosting process is completed; if the waiting time exceeds the preset waiting time (for example, 10 minutes), the heat pump unit of the next priority is selected for loading, and the heat pump units that are not loaded in time are marked. After the defrosting process of these units is completed, it is decided whether to perform a supplementary loading operation according to the current load situation of the heat pump system.

[0090] This step can prevent the performance degradation and failure risks of the heat pump unit caused by forcibly loading a heat pump unit in the defrost state, ensuring the stable operation and service life of the heat pump unit. If the waiting time of the target heat pump unit exceeds the preset waiting time, the heat pump system will automatically select the heat pump unit with the second highest priority for loading and mark the original target heat pump unit that missed this loading opportunity. After the defrosting of the marked heat pump unit is completed, the heat pump system determines whether to perform a supplementary loading operation according to the current load condition. This can ensure the efficiency and flexibility of the loading process of the heat pump system, avoid the excessive impact of the failure or delay of individual heat pump units on the performance of the overall heat pump system, and thus improve the reliability and stability of the operation of the heat pump system.

[0091] This embodiment also provides a heat pump system, which includes a controller and multiple heat pump units. The controller is used to execute the above-mentioned heat pump energy-saving group control method and perform loading and unloading control on the multiple heat pump units.

[0092] Specifically, the controller integrates the above-mentioned heat pump energy-saving group control method and can monitor and control the operating status of each heat pump unit in real time. In this embodiment, the controller collects the operating parameters of each heat pump unit once a minute, such as power consumption, heating output, operating time, refrigerant pressure, and so on. According to these parameters, the controller automatically performs operations such as loading, unloading, and group adjustment to ensure the efficient operation of the heat pump system.

[0093] This heat pump system has a high heat exchange efficiency and operating energy efficiency ratio, reducing the operating cost.

[0094] Obviously, the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

[0095] Note that in the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean 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 the present invention. 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.

Claims

1. A heat pump energy-saving group control method, characterized in that, Including: Obtaining the placement position information of the heat pump units; Grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same mother group, so as to obtain at least two non-adjacent mother groups; Performing loading and unloading control on the heat pump units in one of the mother groups according to the loading and unloading requirements.

2. The heat pump energy-saving group control method according to claim 1, wherein The step of obtaining the placement position information of the heat pump units includes: Displaying a pre-stored standard heat pump unit placement layout library to the user through a line controller; Receiving the target placement layout diagram selected by the user from the library that is consistent with the actual installation site, and the marking operation of the actual installation position of the heat pump units by the user, so as to obtain the specific placement position information of each heat pump unit.

3. The heat pump energy-saving group control method according to claim 1, characterized in that The step of grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same mother group, so as to obtain at least two non-adjacent mother groups includes: According to the placement position information of the heat pump units, constructing a heat pump unit position coordinate system, taking any one heat pump unit as the origin, taking the direction of the row where the heat pump unit is located as the horizontal axis, and taking the direction of the column where the heat pump unit is located as the vertical axis, and assigning a unique two-dimensional coordinate to each heat pump unit; According to the coordinate positions of all heat pump units, dividing the heat pump units that are not adjacent horizontally and vertically into the same group to form a mother group; the number of mother groups is at least two, and the heat pump units in each mother group are not adjacent to each other horizontally and vertically.

4. The heat pump energy-saving group control method according to claim 3, wherein The step of performing loading and unloading control on the heat pump units in one of the mother groups according to the loading and unloading requirements further includes: When the total operation time of the mother groups is equal or the difference is within a preset time threshold, further comparing the energy consumption indexes of each mother group in the past preset time period; selecting the mother group with the lowest energy consumption index for the loading operation, or selecting the mother group with the highest energy consumption index for the unloading operation; the energy consumption index is comprehensively calculated according to the power consumption, heating output, and operation time of the heat pump unit; and ω1 + ω2 = 1; Wherein, ECI represents the energy consumption index; E represents the power consumption; ω1 represents the preset weight of the power consumption; H represents the heating output; ω2 represents the preset weight of the heating output; t represents the operation time.

5. The heat pump energy-saving group control method according to claim 3, characterized in that The step of grouping the heat pump units according to the placement position information of the heat pump units, and dividing the heat pump units that are not adjacent horizontally and vertically into the same mother group, so as to obtain at least two non-adjacent mother groups further includes: Further subdividing each mother group according to the position distribution of the heat pump units in the mother group to form multiple sub-groups, and the heat pump units in each sub-group are at least separated by one heat pump unit horizontally and vertically.

6. The heat pump energy-saving group control method according to claim 5, wherein, The step of performing loading and unloading control on the heat pump units in one of the mother groups according to the loading and unloading requirements includes: When a loading requirement is received, first compare the total operation time of each mother group, and select the mother group with the shortest total operation time; within the selected mother group, compare the operation time of the sub-groups in the selected mother group, the shorter the operation time, the higher the priority, and load the heat pump units in the sub-groups in the order of the priority of the sub-groups; When receiving an unloading requirement, first compare the total operating time of each mother group, and select the mother group with the longest total operating time; within the selected mother group, compare the operating time of the subgroups in the selected mother group, and the longer the operating time, the higher the priority. Unload the heat pump units in the subgroup in the order of the subgroup priority.

7. The heat pump energy-saving group control method according to claim 6, wherein After each loading or unloading operation, a preset time interval is set, and the preset time is set to 15 minutes - 30 minutes.

8. The heat pump energy-saving group control method according to claim 6, characterized in that, The step of controlling the loading and unloading of the heat pump units in one of the mother groups according to the loading and unloading requirements further includes: For subgroups with the same priority, load the heat pump units in the order from outside to inside according to the placement position of the heat pump units; For subgroups with the same priority, unload the heat pump units in the order from inside to outside according to the placement position of the heat pump units.

9. The heat pump energy-saving group control method according to claim 6, characterized in that The step of controlling the loading and unloading of the heat pump units in one of the mother groups according to the loading and unloading requirements further includes: During the process of loading the heat pump unit, if the target heat pump unit is in the defrosting process, add the target heat pump unit to the waiting queue, and wait until the defrosting process is completed before loading; if the waiting time exceeds the preset waiting time, select the heat pump unit with the next priority for loading, and mark the heat pump units that are not loaded in time. After the defrosting process is completed, decide whether to perform a supplementary loading operation according to the current load condition of the heat pump system.

10. A heat pump system, characterized in that, The heat pump system includes a controller and multiple heat pump units, and the controller is used to execute the heat pump energy-saving group control method described in any one of claims 1-9 and control the loading and unloading of the multiple heat pump units.

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