Anti-cold air control method, electronic device and heat pump system

Abstract

This invention relates to the field of air conditioning equipment technology, and in particular to a method for preventing cold air from entering the system, electronic equipment, and a heat pump system. The method includes: acquiring a first outlet temperature of the circulating water in the outlet pipe; when the first outlet temperature is greater than or equal to a first set value, controlling an electronic control element to activate, thereby heating the indoor air using a terminal heat exchanger; acquiring a second outlet temperature of the circulating water in the outlet pipe again; and selectively controlling the operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control element, based on the second outlet temperature. By employing the above steps, this invention can avoid or mitigate the phenomenon of cold air entering the heat pump system when it is turned on for heating, effectively ensuring the heating effect of the heat pump system upon startup and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to a method for controlling cold air, electronic equipment, and heat pump system. Background Technology

[0002] Due to their advantages such as energy saving, environmental protection, and high operational safety, more and more families in northern China are starting to use heat pump systems to keep warm during the colder seasons of late autumn, winter, or early spring.

[0003] However, during the aforementioned seasons, when the heat pump system is first turned on for heating, the low return water temperature in the system leads to insufficient heat exchange efficiency of the fan coil unit, causing cold air to blow out from the heat pump system's outlet, which greatly reduces the user's experience. Summary of the Invention

[0004] In view of this, the present invention provides a method for controlling cold air, an electronic device and a heat pump system to solve the problem that existing heat pump systems blow out cold air when heating is first turned on, resulting in a poor user experience.

[0005] A first aspect of this invention provides a method for preventing cold air from entering the system, applied to the heating mode of a heat pump system. The heat pump system includes a heat pump assembly, an outlet water pipe, an inlet water pipe, and a terminal heat exchanger. The heat pump assembly includes a compressor. The outlet of the heat pump assembly is connected to the inlet of the outlet water pipe. One outlet of the outlet water pipe is connected to the inlet of the terminal heat exchanger. The outlet of the terminal heat exchanger is connected to the inlet of the inlet water pipe. One outlet of the inlet water pipe is connected to the inlet of the heat pump assembly. The inlet water pipe is equipped with a drive component for circulating water. An electronic control element is provided between the inlet water pipe and the terminal heat exchanger. The method for preventing cold air from entering the system includes:

[0006] Obtain the first outlet temperature of the circulating water in the outlet pipeline;

[0007] When the first outlet water temperature is greater than or equal to the first set value, the electronic control element is turned on to heat the indoor air using the terminal heat exchanger.

[0008] The second outlet temperature of the circulating water in the outlet pipeline is obtained again;

[0009] The operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control components, are selectively controlled based on the second outlet water temperature.

[0010] In some embodiments, the terminal heat exchanger is equipped with a fan coil unit;

[0011] The selective control of the operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control components, based on the second outlet water temperature includes:

[0012] When the second outlet water temperature is lower than the first set value, the electronic control component is shut down, and the operating frequency of the compressor is increased;

[0013] When the second outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, the electronic control component and the fan coil fan are controlled to start, the operating frequency of the compressor is increased, the gear of the circulation pump is kept unchanged, or the circulation pump is controlled to upgrade.

[0014] When the second outlet water temperature is greater than the second set value, the electronic control component and the fan coil unit are turned on to maintain the operating frequency of the compressor. At the same time, the circulating pump is upgraded.

[0015] In some embodiments, controlling the electronic control element to shut down and increasing the operating frequency of the compressor when the second outlet water temperature is lower than the first set value includes:

[0016] The operating frequency of the compressor is increased by increasing a predetermined frequency at predetermined intervals;

[0017] The third outlet water temperature of the circulating water flowing into the outlet water pipe is obtained. When the third outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, the electronic control element and the fan are controlled to start.

[0018] In some embodiments, the step of controlling the electronic control element and the fan coil unit to start when the second outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, increasing the operating frequency of the compressor, maintaining the circulation pump's speed unchanged, or controlling the circulation pump to increase its speed includes:

[0019] The temperature difference change rate of the circulating water is obtained, which is used to characterize the temperature change of the circulating water in the outlet pipe and the inlet pipe of the heat pump system within the time interval.

[0020] When the temperature difference change rate is less than a preset threshold, the electronic control component and the fan coil unit are controlled to start, the operating frequency of the compressor is increased, and the speed of the circulation pump remains unchanged.

[0021] When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control component and the fan coil unit are controlled to start, the operating frequency of the compressor is increased, and the circulation pump is controlled to upgrade.

[0022] In some embodiments, the rate of change of temperature difference is positively correlated with the difference between the outlet temperature of the circulating water in the outlet pipe and the inlet temperature of the circulating water in the inlet pipe.

[0023] as well as,

[0024] The rate of change of temperature difference is negatively correlated with the difference between the time of the current detection of the outlet water temperature and the time of the inlet water temperature and the time of the previous detection of the outlet water temperature and the inlet water temperature.

[0025] In some embodiments, the step of controlling the electronic control component and the fan coil unit to start when the temperature difference change rate is less than a preset threshold, increasing the operating frequency of the compressor, and keeping the circulation pump at a constant speed includes:

[0026] The operating frequency of the compressor is increased by increasing the predetermined frequency at predetermined intervals, while the operating speed of the circulating pump remains unchanged.

[0027] In some embodiments, controlling the electronic control element and the fan coil unit to start when the temperature difference change rate is greater than or equal to the preset threshold, increasing the operating frequency of the compressor, and controlling the circulation pump to upgrade includes:

[0028] Control the circulating pump to increase its operating speed by one level through frequency increase, until the circulating pump reaches the target operating speed; and,

[0029] The compressor is controlled to operate in a mode that increases the predetermined frequency until the compressor's operating frequency reaches the target frequency.

[0030] In some embodiments, when the second outlet water temperature is greater than the second set value, controlling the electronic control component and the fan coil unit to start, maintaining the compressor's operating frequency unchanged, and simultaneously controlling the circulation pump to increase its speed includes:

[0031] The circulating pump is controlled to increase its frequency by one level, while the compressor continues to operate at its current operating frequency during this period.

[0032] Obtain the fourth outlet water temperature of the circulating water in the outlet pipe. When the fourth outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, proceed to the next step.

[0033] In some embodiments, prior to the step of obtaining the first outlet temperature of the circulating water in the outlet pipe, the cold air prevention control method further includes the following steps:

[0034] In response to the instruction of the heat pump system to operate in heating mode, the circulating pump is controlled to start at low frequency;

[0035] The heat pump system is controlled to operate in the heating mode to heat the circulating water flowing through the heat pump system.

[0036] A second aspect of the present invention provides an electronic device, the electronic device comprising:

[0037] Memory is used to store one or more computer-executable instructions;

[0038] A processor for calling and executing computer-executable instructions in the memory to implement the anti-cold air control method as described in the first aspect.

[0039] A third aspect of the present invention provides a heat pump system, wherein the heat pump system is controlled using the anti-cold air control method described in the first aspect; or

[0040] The heat pump system has the electronic equipment described in the second aspect.

[0041] Compared with the prior art, the main advantages of the present invention are as follows:

[0042] In the cold air prevention control method, electronic device, and heat pump system of the present invention, the cold air prevention control method is applied to the heating mode of the heat pump system. The heat pump system includes a heat pump assembly, an outlet water pipe, an inlet water pipe, and a terminal heat exchanger. A compressor is installed in the heat pump assembly. The outlet of the heat pump assembly is connected to the inlet of the outlet water pipe. One outlet of the outlet water pipe is connected to the inlet of the terminal heat exchanger. The outlet of the terminal heat exchanger is connected to the inlet of the inlet water pipe. One outlet of the inlet water pipe is connected to the inlet of the heat pump assembly. A drive circulation device is installed on the inlet water pipe. The invention includes a driving component for the circulating water system and an electronic control element installed between the inlet pipe and the terminal heat exchanger. In this cold air prevention control method: firstly, the first outlet temperature of the circulating water in the outlet pipe is obtained; then, when the first outlet temperature is greater than or equal to a first set value, the electronic control element is activated to heat the indoor air using the terminal heat exchanger; next, the second outlet temperature of the circulating water in the pipe is obtained again; finally, the operating status of the compressor and circulating pump, as well as the conduction status of the electronic control element, are selectively controlled based on the second outlet temperature. By employing the above steps, this invention effectively avoids the phenomenon of cold air being generated when the heat pump system is turned on in heating mode, thereby effectively ensuring the heating effect of the heat pump system upon startup and improving the user experience. Attached Figure Description

[0043] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0044] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0045] Figure 1 This is a schematic diagram of the structure of a heat pump system according to an embodiment of the present invention;

[0046] Figure 2 This is a flowchart of the steps of a method for controlling cold air according to an embodiment of the present invention;

[0047] Figure 3 This is a logic judgment flowchart of an anti-cold air control method according to an embodiment of the present invention.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100. Heat pump system; 110. Heat pump unit; 120. Outlet water pipe; 121. Control valve; 122. First rubber flexible joint; 123. First pressure sensing element; 124. First control valve; 125. Auxiliary heating element; 130. Inlet water pipe; 131. Electric valve; 132. Second rubber flexible joint; 133. Drain valve; 134. Second pressure sensing element; 135. Second control valve; 136. Third control valve; 137. Drive element; 138. Filter; 139. Fourth control valve; 140. Terminal heat exchanger; 150. Main control valve; 160. Automatic air vent valve; 170. First temperature sensing element; 180. Second temperature sensing element; 190. Makeup water pipe; 200. Regulating valve. Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0052] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0053] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0054] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0055] like Figure 1 As shown, an exemplary embodiment of the present invention provides a heat pump system 100, which includes a heat pump unit 110, an outlet water pipe 120, an inlet water pipe 130, and a plurality of terminal heat exchangers 140. The terminal heat exchangers 140 may include, but are not limited to, fan coil units, and a fan coil fan is provided in each terminal heat exchanger 140. Furthermore, the number of terminal heat exchangers 140 is at least one.

[0056] The heat pump unit 110 includes structural components such as a heat exchanger (not shown in the figure) and a compressor (not shown in the figure).

[0057] The inlet of the outlet pipe 120 is connected to the outlet of the heat pump unit 110. The end of the outlet pipe 120 is provided with N outlets, each of which is connected to the inlet of a terminal heat exchanger 140. Here, N is any integer value greater than or equal to 2.

[0058] The outlet of the inlet pipe 130 is connected to the inlet of the heat pump unit 110. N inlets are located at the upstream end of the inlet pipe 130, and each of the N inlets is connected to the outlet of a terminal heat exchanger 140, where N is any integer greater than or equal to 2. The number of outlets on the outlet pipe 120 and the number of inlets on the inlet pipe 130 are equal to the number of terminal heat exchangers 140.

[0059] In other words, each terminal heat exchanger 140, together with the outlet water pipe 120, the inlet water pipe 130, and the heat pump unit 110, forms a circulating heat exchange loop. This circulating heat exchange loop can directly act on the indoor environment, allowing for flexible adjustment of the indoor temperature. (See also...) Figure 1 As shown by the arrows, the arrows are used to indicate the flow direction of circulating water in the circulating heat exchange loop.

[0060] During the control process of the heat pump system 100, when the temperature of the circulating water reaches a certain level, such as between 35℃ and 45℃, the control system needs to autonomously control the conduction of the terminal heat exchanger 140. Therefore, in each circulating heat exchange loop, an electrical control element 131 is installed on the pipeline between one of the inlet pipes 130 and the corresponding terminal heat exchanger 140. The electrical control element 131 may include, but is not limited to, an electric two-way valve. In other words, by autonomously controlling the electric two-way valve, i.e., the electrical control element 131, the control system improves the level of intelligence in the autonomous control of the heat pump system 100.

[0061] A control valve 121 is installed on the pipeline between one of the outlets of the water outlet pipeline 120 and the corresponding terminal heat exchanger 140. The control valve 121 may include, but is not limited to, a ball valve or an electric ball valve. It should be noted that the control valve 121 is used infrequently. During system maintenance or installation, when the electrical control component 131 is closed, the control valve 121 can be closed manually to prevent a large amount of heavy water from being discharged from the system. Therefore, a ball valve can be used for the control valve 121.

[0062] Each terminal heat exchanger 140 is equipped with a corresponding temperature controller, which can control the set temperature of the corresponding terminal heat exchanger 140.

[0063] It should be noted that each circulating heat exchange loop is controlled using the anti-cold air control method described in the following embodiments. The anti-cold air control method is illustrated in the following embodiments and will not be repeated here.

[0064] A main control valve 150 is installed on each branch of the inlet pipe 130 and the outlet pipe 120. The main control valve 150 may include, but is not limited to, electric valves, ball valves or gate valves.

[0065] Automatic air vent valves 160 are installed at the highest points of the inlet pipe 130 and the outlet pipe 120. The automatic air vent valves 160 can automatically release air from the pipes. Alternatively, when there is a large air pressure in the inlet pipe 130 or the outlet pipe 120, that is, when the air pressure exceeds the set air vent value of the automatic air vent valve 160, the automatic air vent valve 160 can release pressure to ensure the smooth flow of circulating water in the pipes and to keep the pressure in the pipes within a suitable range.

[0066] A first temperature detection element 170 is installed at the end branch pipe of the outlet pipe 120. The first temperature detection element 170 may include, but is not limited to, a temperature sensor or a temperature and humidity sensor. The first temperature detection element 170 is used to detect the temperature value of the circulating water flowing out of the heat pump unit 110 in the outlet pipe 120, that is, the outlet water temperature.

[0067] The outlet pipe 120 between the heat pump unit 110 and the first temperature detection element 170 is also sequentially provided with a first rubber flexible connector 122, a first pressure detection element 123, a first control valve 124, and an auxiliary heating element 125. Among them, the first rubber flexible connector 122 is located close to the heat pump unit 110, and the auxiliary heating element 125 is located close to the first temperature detection element 170.

[0068] The first rubber flexible connector 122 is used to realize a flexible connection between the heat pump unit 110 and the water outlet pipe 120, so as to reduce the impact of the vibration of the heat pump unit 110 on the stability of the water outlet pipe 120.

[0069] The first pressure detection element 123 may include, but is not limited to, a pressure gauge, which is used to detect the water pressure of the circulating water in the outlet pipe 120.

[0070] The first control valve 124 may include, but is not limited to, a gate valve, a ball valve, or an electric valve.

[0071] The auxiliary heating element 125 is used to further heat the circulating water in the outlet pipe 120 to ensure that the temperature of the circulating water flowing to the terminal heat exchanger 140 is always within a suitable temperature range. In some embodiments, the auxiliary heating element 125 may include, but is not limited to, an electric heating wire or a PTC (Positive Temperature Coefficient) heater.

[0072] In the initial stage of heat pump unit 110 startup, the operating frequency of the compressor in heat pump unit 110 will not immediately rise to the target frequency. At this time, the auxiliary heating element 125 can be used to assist in heating the circulating water in the outlet water pipe 120, so that the temperature of the circulating water can rise rapidly, thereby shortening the initial startup or preparation time of heat pump unit 110.

[0073] A second temperature sensor 180 is installed at the end branch of the inlet water pipe 130. The second temperature sensor 180 may include, but is not limited to, a temperature sensor or a temperature and humidity sensor. The second temperature sensor 180 is used to detect the temperature value of the circulating water flowing out of the terminal heat exchanger 140 in the inlet water pipe 130, i.e., the inlet water temperature.

[0074] On the water inlet pipe 130 between the heat pump unit 110 and the second temperature detection element 180, a second rubber flexible connector 132, a drain valve 133, a second pressure detection element 134, a second control valve 135, a third control valve 136, a drive element 137, a filter 138 and a fourth control valve 139 are also sequentially installed.

[0075] The second rubber flexible connector 132 is located near the heat pump unit 110, and the fourth control valve 139 is a pressure reducing valve and is located near the second temperature detection element 180.

[0076] The second rubber flexible connector 132 is used to realize a flexible connection between the heat pump unit 110 and the water inlet pipe 130, so as to reduce the impact of the vibration of the heat pump unit 110 on the stability of the water inlet pipe 130.

[0077] The second pressure detection element 134 may include, but is not limited to, a pressure gauge, which is used to detect the water pressure of the circulating water in the inlet pipe 130.

[0078] The second control valve 135 may include, but is not limited to, a gate valve, a ball valve, or an electric valve. The third control valve 136 may include, but is not limited to, a check valve.

[0079] The drive unit 137 may include, but is not limited to, a variable frequency water pump. Intersecting flexible connectors are provided on both sides of the drive unit 137, namely between the inlet of the drive unit 137 and the water inlet pipe 130, and between the outlet of the drive unit 137 and the water inlet pipe 130, to reduce the impact of vibration of the drive unit 17 during operation on the stability of the water inlet pipe 130.

[0080] Filter 138 may be a Y-type filter. The fourth control valve 139 may include, but is not limited to, a pressure reducing valve.

[0081] A water supply line 190 is also provided between the fourth control valve 139 and the second temperature sensor 180. It should be noted that the water supply line 190 is equipped with a check valve, a filter, and control valves. This water supply line 190 can replenish the inlet water line 130 with circulating water, which includes at least tap water.

[0082] A regulating valve 200 is installed between the outlet pipe 120 and the inlet pipe 130. One end of the regulating valve 200 is located on the outlet pipe 120 between the first control valve 124 and the auxiliary heating element 125, and the other end is located on the inlet pipe 130 between the second control valve 135 and the third control valve 136. It should be noted that the regulating valve 200 is a differential pressure bypass valve, which can be used in the heat pump system 100 to balance the pressure difference between the outlet and inlet water in the outlet pipe 120 and the inlet pipe 130, helping to prevent damage to the heat pump system 100 due to excessive pressure difference.

[0083] In a preferred embodiment, the first rubber flexible connector 122, the first pressure detection component 123, the first control valve 124, the second rubber flexible connector 132, the drain valve 133, the second pressure detection component 134, the second control valve 135, the third control valve 136, the drive component 137, the filter 138, the fourth control valve 139, and the regulating valve 200 can all be integrated into a single mounting box to form a variable frequency hydraulic module. This reduces the installation workload of the heat pump system 100 and lowers the installation and commissioning costs of the heat pump system 100.

[0084] like Figure 2 As shown, an exemplary embodiment of the present invention also provides a method for controlling cold air in a heat pump unit, the method comprising the following steps:

[0085] Step S100: Obtain the first outlet water temperature of the circulating water in the outlet pipe.

[0086] Step S200: When the first outlet water temperature is greater than or equal to the first set value, the control electronic component is turned on to heat the indoor air using the terminal heat exchanger.

[0087] Step S300: Obtain the second outlet water temperature of the circulating water in the outlet pipe again.

[0088] Step S400: Selectively control the operating status of the compressor and circulating pump, as well as the conduction status of the electronic control components, based on the second outlet water temperature.

[0089] In step S100, when it is necessary to heat the air in the room, the heat pump system 100 is set to operate in heating mode via a corresponding thermostat. At this time, the first temperature sensor 170 installed on the outlet water pipe 120 can detect the first outlet water temperature T1 of the circulating water in the outlet water pipe 120 at first time intervals. The first time interval can be 1 second. That is, the control system of the heat pump system 100 acquires the temperature value of the first outlet water temperature T1 every 1 second.

[0090] It should be noted that the first time value can be any value other than 1 second, such as 1.5s, 2s, 2.5s, etc. This first time value can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the first time value can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0091] The control system of the heat pump system 100 can be a control system in the existing technology, as long as the control system can control the various start-up functions of the heat pump system 100. The specific structure and control strategy of the control system will not be described in detail here.

[0092] In step S200, heat loss occurs in the flow of circulating water through the outlet pipe 120. This heat loss is related to the insulation material of the pipe and the heat exchange efficiency of the corresponding terminal heat exchanger 140. Therefore, when the detected first outlet water temperature T1 is greater than or equal to the first set value A, it indicates that after the circulating water at the first outlet water temperature T1 reaches the position of the terminal heat exchanger 140, the circulating water at this temperature undergoes heat exchange with the air, and the temperature of the heated air meets the temperature value set by the thermostat. At this time, the electronic control element 131 is turned on, thereby heating the indoor air through the terminal heat exchanger 140.

[0093] When the heated circulating water supplied by the heat pump unit 110 flows to the terminal heat exchanger 140, the fan of the fan coil unit installed at the terminal heat exchanger 140 starts. After the indoor cold air passes through the terminal heat exchanger 140, it exchanges heat with the heated circulating water, thereby heating the indoor cold air.

[0094] The first setpoint A can be 35℃. However, it can also be any other value besides 35℃, such as 34℃, 34.5℃, 35.5℃, or 36℃. It should be noted that the first setpoint A can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the first setpoint A can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0095] In step S300, after the first outlet water temperature T1 is detected for the first time, and when the first outlet water temperature T1 is greater than or equal to the first set value A, it indicates that heat exchange has occurred at the end heat exchanger 140 at the end of the outlet water pipe 120. This may cause the temperature value of the first outlet water temperature T1 to decrease in the next instance, and there is still a possibility of cold air being blown subsequently. Therefore, in order to prevent the subsequent blowing of cold air, the control system detects the second outlet water temperature T2 of the circulating water in the outlet water pipe 120 again through the first temperature detection element 170 installed on the outlet water pipe 120.

[0096] In step S400, the operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control element 131, are selectively controlled according to the second outlet water temperature T2.

[0097] In one example, when the second outlet water temperature T2 is less than the first set value A, it indicates that the temperature of the circulating water in the outlet water pipe 120 fails to meet the subsequent heating requirements of the air. In other words, the temperature of the cold air heated by the circulating water at the second outlet water temperature T2 in the terminal heat exchanger 140 does not meet the temperature value set by the user through the thermostat. At this time, the cold air after heat exchange is still slightly warm. The control system then prevents the control valve 121 between the terminal heat exchanger 140 and the outlet water pipe 120 from opening to prevent cold air from being blown out. Subsequently, the temperature of the second outlet water temperature T2 can be increased by increasing the compressor's operating frequency or by using the auxiliary heating element 125 to further heat the circulating water in the outlet water pipe 120. Once the temperature value of the second outlet water temperature T2 is greater than or equal to the first set value A and less than or equal to the second set value B, the electrical control element 131 between the terminal heat exchanger 140 and the inlet water pipe 130 is connected. At the same time, the fan is turned on to heat the indoor air through the terminal heat exchanger 140.

[0098] In another example, when the second outlet water temperature T2 is greater than or equal to the first set value A and less than or equal to the second set value B, the electrical control element 141 between the terminal heat exchanger 140 and the inlet water pipe 130 can be turned on, and at the same time, the fan coil unit is turned on.

[0099] It should be noted that the second setpoint B can be 45℃, but it can also be any other value besides 45℃, such as 44℃, 44.5℃, 45.5℃, and 46℃. Furthermore, the second setpoint B can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the second setpoint B can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0100] In another example, when the second outlet water temperature T2 is greater than the second set value B, it indicates that the temperature of the circulating water in the outlet pipe 120 is too high, which may cause the subsequent heat exchange temperature to be high. This will increase the energy consumption of the heat pump system 100 and also cause discomfort to the user. At this time, based on the control system keeping the compressor operating frequency unchanged, the operating level of the circulating pump is gradually increased to appropriately reduce the temperature value of the second outlet water temperature T2. For example, the operating level of the circulating pump is adjusted from low to medium. During this period, the second outlet water temperature T2 of the circulating water in the outlet pipe 120 is continuously monitored until the temperature value of the second outlet water temperature T2 is greater than or equal to the first set value A and less than or equal to the second set value B. Then, the electrical control element 131 between the terminal heat exchanger 140 and the inlet pipe 130 is turned on, and the fan is started.

[0101] In this example, by adopting the above steps, the phenomenon of cold air being generated when the heat pump system 100 is turned on in heating mode can be effectively avoided or weakened, thereby effectively ensuring the heating effect of the heat pump system 100 when it is turned on and improving the user experience.

[0102] like Figure 3 As shown, in some embodiments, selectively controlling the operating status of the compressor and circulating pump, as well as the conduction status of the electronic control components, based on the second outlet water temperature T2 includes the following schemes:

[0103] When the second outlet water temperature T2 is less than the first set value A, the control electronic component 131 is shut down, and the operating frequency of the compressor is increased.

[0104] When the second outlet water temperature T2 is greater than or equal to the first set value A and less than or equal to the second set value B, the control electronic component 131 and the fan coil fan are turned on to increase the operating frequency of the compressor, keep the circulation pump gear unchanged, or control the circulation pump to upgrade.

[0105] When the second outlet water temperature T2 is greater than the second set value B, the control electronic component 131 and the fan coil unit are turned on to maintain the compressor's operating frequency. At the same time, the circulation pump is upgraded.

[0106] In one example, when the second outlet water temperature T2 is less than the first set value A, i.e., T2 < A, it indicates that the temperature of the circulating water in the outlet pipe 120 fails to meet the subsequent heating requirements of the air. In other words, the temperature of the cold air heated by the circulating water at the second outlet temperature T2 in the terminal heat exchanger 140 does not meet the temperature set by the user through the thermostat; the cold air after heat exchange is still slightly warm. In this case, the following method can be used:

[0107] First, the control system shuts down the control electronic component 131 and the fan coil unit. Simultaneously, it increases the compressor's operating frequency at preset intervals, for example, controlling the compressor to operate at a predetermined frequency increase every second time interval. The second time interval can be 60 seconds, or it can be any value other than 60 seconds, such as any value between 50 and 70 seconds. This second time interval can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the second time interval can gradually increase with altitude, or it can gradually increase with the user's latitude.

[0108] The predetermined frequency can be between 2Hz and 8Hz, but preferably 5Hz. That is, the compressor frequency will be increased by 5Hz every 60 seconds.

[0109] Then, at each interval, the third outlet water temperature T3 of the circulating water flowing into the outlet water pipe 120 is obtained through the first temperature detection element 170. When the third outlet water temperature T3 is greater than or equal to the first set value A and less than or equal to the second set value B, the electronic control element 131 and the fan coil fan are turned on to heat the indoor cold air through the terminal heat exchanger 140. In the initial stage of this process, that is, during the start-up of the heating mode, there will be no direct cold air blowing at the terminal heat exchanger 140, which effectively improves the user experience.

[0110] In another example, when the second outlet water temperature T2 is greater than or equal to the first set value A and less than or equal to the second set value B (i.e., A≤T2≤B), it indicates that after the circulating water at this temperature reaches the terminal heat exchanger 140, the circulating water at this temperature exchanges heat with the air, and the temperature of the heated air matches the temperature value set by the thermostat. In this case, the following method can be used:

[0111] First, the temperature difference change rate K of the circulating water is obtained. This temperature difference change rate K is used to characterize the temperature change of the circulating water in the outlet pipe 120 and the inlet pipe 130 of the heat pump system 100 within the time interval.

[0112] Among them, the rate of temperature difference change is positively correlated with the difference between the outlet water temperature and the inlet water temperature of the circulating water in the outlet pipe and the inlet water temperature in the inlet pipe, and negatively correlated with the difference between the time of the current detected outlet water temperature and the time of the inlet water temperature and the time of the last detected outlet water temperature and the time of the inlet water temperature.

[0113] In a specific example, the rate of change of temperature difference K of the circulating water can be determined based on the following formula:

[0114] K = (T 出 -T 进 ) / △t

[0115] Among them, T 出 Used to characterize the outlet temperature of heated circulating water entering the outlet pipe 120;

[0116] T 进 Used to characterize the inlet water temperature of the circulating water returning to the inlet pipe 130 after heat exchange in the terminal heat exchanger 140;

[0117] △t is used to characterize the difference between the time of the current detection of the outlet water temperature and the time of the previous detection of the outlet water temperature and the time of the previous detection of the inlet water temperature.

[0118] When the rate of change of temperature difference K is less than the preset threshold C, it indicates that although the temperature of the circulating water is sufficient to meet the subsequent heating requirements, the temperature is still slightly too low and needs to be further increased. At this time, the control system activates the electronic control component 131 and the fan coil unit, and the compressor operates at a predetermined frequency every third time interval, while maintaining the operating speed of the circulating pump unchanged. The preset threshold C can be 0.5.

[0119] The third time value can be 60 seconds, or it can be any value other than 60 seconds, such as any value between 50 and 70 seconds. This third time can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the third time can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0120] During compressor frequency ramp-up operation, the temperature difference change rate K of the circulating water is continuously acquired in real time or at intervals until the temperature difference change rate K is greater than or equal to the preset threshold C.

[0121] When the rate of change of temperature difference K is greater than or equal to the preset threshold C, it indicates that the temperature of the circulating water meets the subsequent heating requirements and is suitable. At this time, the control system controls the electronic control component 131 and the fan coil unit to start, and simultaneously controls the circulating pump to increase its speed by one level every four time intervals in a frequency-increasing manner until the circulating pump reaches the target speed. Running the circulating pump at the target speed is more energy-efficient.

[0122] When the circulation pump increases its speed by increasing its frequency, the temperature of the circulating water in the inlet pipe 130 will decrease, which in turn will cause the temperature of the circulating water entering the outlet pipe 120 to decrease. Therefore, while the circulation pump increases its speed, the control system controls the compressor to operate in a mode that increases the predetermined frequency every four time intervals until the compressor's operating frequency reaches the target frequency.

[0123] The fourth time value can be 30 seconds, or it can be any value other than 30 seconds, such as any value between 20 and 40 seconds. This fourth time can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the fourth time can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0124] In another example, when the second outlet water temperature T2 is greater than the second set value B, i.e., T2 > B, it indicates that the temperature of the circulating water in the outlet pipe 120 is too high. This may cause the subsequent heat exchange temperature to be high, increasing the energy consumption of the heat pump system 100 and causing discomfort to the user. In this case, the following methods can be used:

[0125] First, the control system controls the operation of the electronic control component 131 and the fan coil unit, and controls the circulating pump to increase its frequency by one level every five time intervals, while maintaining the compressor's operating frequency unchanged. In other words, by increasing the operating level and frequency of the circulating pump, the temperature of the circulating water in the inlet pipe 130 is appropriately reduced, thereby lowering the second outlet temperature T2 of the circulating water in the outlet pipe 120. This ensures that when the circulating water exchanges heat with the cold air, the temperature of the heated cold air remains within the temperature range set by the thermostat, improving the user experience.

[0126] The fifth time value can be 30 seconds, or it can be any value other than 30 seconds, such as any value between 20 and 40 seconds. This fifth time can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the fifth time can gradually increase with increasing altitude, or it can gradually increase with increasing latitude of the user's location.

[0127] Then, the fourth outlet water temperature of the circulating water in the outlet pipe 120 is obtained. When the fourth outlet water temperature is greater than or equal to the first set value A and less than or equal to the second set value B, the next operation is executed, that is, the operation in the example above where A≤T2≤B is executed.

[0128] like Figure 3 As shown, in some embodiments, before obtaining the first outlet water temperature T1, the anti-cold air control method further includes the following steps:

[0129] When the air in a room needs to be heated, the user can operate the corresponding thermostat. That is, the control system responds to the instruction of the heat pump system 100 to run in heating mode and controls the circulation pump on the water inlet pipe 130 of the heat pump system 100 to start in low frequency mode.

[0130] Then, the heat pump system 100 is controlled to operate in heating mode to heat the circulating water flowing through the heat pump system 100.

[0131] An exemplary embodiment of the present invention also provides an electronic device, which includes a processor (not shown in the figure) and a memory (not shown in the figure) connected to the processor. The memory is used to store one or more computer-executable instructions. These computer-executable instructions can be invoked by the processor to execute the anti-cold air control method in any of the above embodiments.

[0132] The heat pump system 100 may also include the electronic devices described in the above embodiments.

[0133] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0134] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for controlling cold air flow, applied to the heating mode of a heat pump system, the heat pump system comprising a heat pump assembly, an outlet water pipe, an inlet water pipe, and a terminal heat exchanger, wherein the heat pump assembly includes a compressor, the outlet end of the heat pump assembly is connected to the inlet of the outlet water pipe, one outlet of the outlet water pipe is connected to the inlet of the terminal heat exchanger, the outlet of the terminal heat exchanger is connected to the inlet of the inlet water pipe, and one outlet of the inlet water pipe is connected to the inlet end of the heat pump assembly, wherein... The inlet pipe is equipped with a driving component for circulating water, the driving component being a circulating pump; and an electronic control element is provided between the inlet pipe and the terminal heat exchanger. The method for preventing cold air flow includes: Obtain the first outlet temperature of the circulating water in the outlet pipeline; When the first outlet water temperature is greater than or equal to the first set value, the electronic control element is turned on to heat the indoor air using the terminal heat exchanger. The second outlet temperature of the circulating water in the outlet pipeline is obtained again; The operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control components, are selectively controlled based on the second outlet water temperature. The terminal heat exchanger is equipped with a fan coil unit; The selective control of the operating status of the compressor and the circulating pump, as well as the conduction status of the electronic control components, based on the second outlet water temperature includes: When the second outlet water temperature is lower than the first set value, the electronic control component is shut down, and the operating frequency of the compressor is increased; When the second outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, the electronic control component and the fan coil unit are controlled to start, the operating frequency of the compressor is increased, the gear of the circulation pump remains unchanged, or the circulation pump is controlled to upgrade, including: The temperature difference change rate of the circulating water is obtained, which is used to characterize the temperature change of the circulating water in the outlet pipe and the inlet pipe of the heat pump system within the time interval. When the temperature difference change rate is less than a preset threshold, the electronic control component and the fan coil unit are controlled to start, the operating frequency of the compressor is increased, and the speed of the circulation pump remains unchanged. When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control component and the fan coil unit are turned on, the operating frequency of the compressor is increased, and the circulation pump is upgraded. When the second outlet water temperature is greater than the second set value, the electronic control component and the fan coil unit are turned on to maintain the operating frequency of the compressor. At the same time, the circulating pump is upgraded.

2. The method for controlling cold air according to claim 1, characterized in that, The step of controlling the electronic control component to shut down and increasing the operating frequency of the compressor when the second outlet water temperature is lower than the first set value includes: The operating frequency of the compressor is increased by increasing a predetermined frequency at predetermined intervals; The third outlet water temperature of the circulating water flowing into the outlet water pipe is obtained. When the third outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, the electronic control element and the fan are controlled to start.

3. The method for controlling cold air according to claim 1, characterized in that, The temperature difference change rate is positively correlated with the difference between the outlet water temperature and the inlet water temperature of the circulating water in the outlet pipe. as well as, The rate of change of temperature difference is negatively correlated with the difference between the time of the current detection of the outlet water temperature and the time of the inlet water temperature and the time of the previous detection of the outlet water temperature and the inlet water temperature.

4. The method for controlling cold air according to claim 1, characterized in that, When the temperature difference change rate is less than a preset threshold, controlling the electronic control component and the fan coil unit to start, increasing the operating frequency of the compressor, and maintaining the circulation pump speed unchanged includes: The operating frequency of the compressor is increased by increasing the predetermined frequency at predetermined intervals, while the operating speed of the circulating pump remains unchanged.

5. The method for controlling cold air according to claim 1, characterized in that, When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control component and the fan coil unit are controlled to start, the operating frequency of the compressor is increased, and the circulation pump is controlled to upgrade, including: Control the circulating pump to increase its operating speed by one level through frequency increase, until the circulating pump reaches the target operating speed; and, The compressor is controlled to operate in a mode that increases the predetermined frequency until the compressor's operating frequency reaches the target frequency.

6. The method for controlling cold air according to any one of claims 1 to 5, characterized in that, When the second outlet water temperature is greater than the second set value, the electronic control component and the fan coil unit are controlled to start, maintaining the compressor's operating frequency unchanged. Simultaneously, the circulating pump is controlled to increase its speed, including: The circulating pump is controlled to increase its frequency by one level, while the compressor continues to operate at its current operating frequency during this period. Obtain the fourth outlet water temperature of the circulating water in the outlet pipe. When the fourth outlet water temperature is greater than or equal to the first set value and less than or equal to the second set value, proceed to the next step.

7. The method for controlling cold air according to any one of claims 1 to 5, characterized in that, Before the step of obtaining the first outlet water temperature of the circulating water in the outlet pipe, the cold air prevention control method further includes the following steps: In response to the instruction of the heat pump system to operate in heating mode, the circulating pump is controlled to start at low frequency; The heat pump system is controlled to operate in the heating mode to heat the circulating water flowing through the heat pump system.

8. An electronic device, characterized in that, The electronic device includes: Memory is used to store one or more computer-executable instructions; A processor for calling and executing computer-executable instructions in the memory to implement the anti-cold air control method as described in any one of claims 1 to 7.

9. A heat pump system, characterized in that, Controlled by the anti-cold air control method as described in any one of claims 1 to 7; or The heat pump system has the electronic equipment as described in claim 8.

Images