Cold air prevention control method, electronic equipment and heat pump system

Abstract

The invention relates to the technical field of air conditioning equipment, in particular to a cold air prevention control method, electronic equipment and a heat pump system. The cold air prevention control method comprises the steps that the first water outlet temperature of circulating water in a water outlet pipeline is obtained; when the first outlet water temperature is larger than or equal to a first set value, an electric control element is controlled to be started, and indoor air is heated through a tail end heat exchanger; the second water outlet temperature of the circulating water in the water outlet pipeline is obtained again; and selectively controlling the operation states of the compressor and the circulating pump and the conduction state of the electric control element according to the second outlet water temperature. By the adoption of the steps, the phenomenon that cold air is generated when the heat pump system is started up for heating can be avoided or weakened, the starting heating effect of the heat pump system is effectively guaranteed, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a cold wind prevention control method, electronic equipment and a heat pump system. Background Art

[0002] Because of its advantages such as energy saving, environmental protection and high operating safety factor, more and more northern families are beginning to use heat pump systems to provide heating in colder seasons such as late autumn, winter or early spring.

[0003] However, in the above seasons, when the heat pump system is just turned on, the return water temperature in the system is low, resulting in insufficient heat exchange efficiency of the fan coil unit, causing cold air to blow out from the air outlet of the heat pump system, greatly reducing the user experience. Summary of the invention

[0004] In view of this, the present invention provides a cold wind prevention control method, an electronic device and a heat pump system to solve the problem that the existing heat pump system blows out cold wind when the heating is just started, resulting in a poor user experience.

[0005] A first aspect of an embodiment of the present invention provides a cold wind prevention control method, which is applied to a heating mode of a heat pump system, wherein the heat pump system comprises a heat pump component, a water outlet pipeline, a water inlet pipeline and a terminal heat exchanger, wherein a compressor is arranged in the heat pump component, a water outlet end of the heat pump component is communicated with an inlet of the water outlet pipeline, one of the outlets of the water outlet pipeline is communicated with an inlet of the terminal heat exchanger, an outlet of the terminal heat exchanger is communicated with an inlet of the water inlet pipeline, one of the outlets of the water inlet pipeline is communicated with a water inlet end of the heat pump component, wherein a driving member for promoting circulation of circulating water is arranged on the water inlet pipeline, and an electric control element is arranged between the water inlet pipeline and the terminal heat exchanger, and the cold wind prevention control method comprises:

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

[0007] When the first outlet water temperature is greater than or equal to a first set value, the electric control element is controlled to turn on, so as to heat the indoor air by using the terminal heat exchanger;

[0008] obtaining again a second outlet water temperature of the circulating water in the outlet water pipeline;

[0009] The operating states of the compressor and the circulating pump and the conduction state of the electronic control element are selectively controlled according to the second outlet water temperature.

[0010] In some embodiments, a fan disc fan is provided in the terminal heat exchanger;

[0011] The selectively controlling the operating states of the compressor and the circulating pump and the conduction state of the electronic control element according to the second outlet water temperature includes:

[0012] When the second outlet water temperature is lower than a first set value, the electronic control element is controlled to be turned off, 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 element and the fan fan are controlled to turn on, the operating frequency of the compressor is increased, the gear position of the circulating pump is kept unchanged, or the circulating pump is controlled to shift up;

[0014] When the second outlet water temperature is greater than the second set value, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is kept unchanged, and at the same time, the circulating pump is controlled to shift up.

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

[0016] Increasing the operating frequency of the compressor by increasing the predetermined frequency at predetermined intervals;

[0017] The third outlet water temperature of the circulating water flowing into the outlet water pipeline is obtained, and 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 of the air disc are controlled to turn on.

[0018] In some embodiments, 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, controlling the electronic control element and the fan fan to turn on, increasing the operating frequency of the compressor, keeping the gear position of the circulating pump unchanged, or controlling the circulating pump to shift up, includes:

[0019] Obtaining a temperature difference change rate of the circulating water, wherein the temperature change rate is used to characterize a temperature change of the circulating water in the water outlet pipeline and the water inlet pipeline of the heat pump system within an interval time difference;

[0020] When the temperature difference change rate is less than a preset threshold, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is increased, and the gear position of the circulating pump is kept unchanged;

[0021] When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is increased, and the circulating pump is controlled to shift up.

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

[0023] as well as,

[0024] The temperature difference change rate is negatively correlated with the difference between the time of the currently detected water outlet temperature and the time of the water inlet temperature and the time of the last detected water outlet temperature and the time of the water inlet temperature.

[0025] In some embodiments, when the temperature difference change rate is less than a preset threshold, controlling the electronic control element and the fan fan to turn on, increasing the operating frequency of the compressor, and keeping the gear position of the circulating pump unchanged includes:

[0026] The operating frequency of the compressor is increased by increasing the predetermined frequency at predetermined intervals, while the operating gear position of the circulation pump is kept unchanged.

[0027] In some embodiments, when the temperature difference change rate is greater than or equal to the preset threshold, controlling the electronic control element and the fan fan to turn on, increasing the operating frequency of the compressor, and controlling the circulating pump to shift up includes:

[0028] Controlling the circulating pump to increase one gear in a frequency-increasing manner until the operating gear of the circulating pump reaches a target gear; and,

[0029] The compressor is controlled to operate in a mode of increasing a predetermined frequency until the operating frequency of the compressor reaches a target frequency.

[0030] In some embodiments, when the second outlet water temperature is greater than the second set value, controlling the electronic control element and the fan fan to turn on, keeping the operating frequency of the compressor unchanged, and controlling the circulating pump to shift up, comprises:

[0031] Control the circulating pump to increase the frequency by one gear, during which the compressor is controlled to continue to operate at the current operating frequency;

[0032] A fourth outlet water temperature of the circulating water in the outlet water pipeline is obtained, and 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, the next step is performed.

[0033] In some embodiments, before the step of obtaining the first outlet water temperature of the circulating water in the outlet water pipeline, the cold wind prevention control method further includes the following steps:

[0034] In response to an instruction that the heat pump system operates in a heating mode, controlling the circulation pump to start at a low frequency;

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

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

[0037] a memory for storing one or more computer executable instructions;

[0038] The processor is used to call and execute the computer executable instructions in the memory, so as to implement the cold wind prevention control method as described in the first aspect.

[0039] A third aspect of the embodiments of the present invention provides a heat pump system, wherein the heat pump system is controlled by the cold wind prevention control method as described in the first aspect; or

[0040] The heat pump system comprises the electronic device as described in the second aspect.

[0041] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0042] The cold wind prevention control method, electronic device and heat pump system of the present invention are applied to the heating mode of the heat pump system. The heat pump system includes a heat pump component, a water outlet pipeline, a water inlet pipeline and a terminal heat exchanger. A compressor is provided in the heat pump component. The water outlet end of the heat pump component is connected to the inlet of the water outlet pipeline, one of the outlets of the water outlet pipeline is connected to the inlet of the terminal heat exchanger, the outlet of the terminal heat exchanger is connected to the inlet of the water inlet pipeline, one of the outlets of the water inlet pipeline is connected to the water inlet end of the heat pump component, and a push circulation is provided on the water inlet pipeline. The driving part of the water circulation, and the electric control element are arranged between the water inlet pipeline and the terminal heat exchanger. In the cold wind prevention control method: firstly, the first outlet water temperature of the circulating water in the outlet water pipeline is obtained; then, when the first outlet water temperature is greater than or equal to the first set value, the electric control element is controlled to be turned on to heat the indoor air by using the terminal heat exchanger; then, the second outlet water temperature of the circulating water in the pipeline is obtained again; finally, the operating state of the compressor and the circulating pump and the conduction state of the electric control element are selectively controlled according to the second outlet water temperature. By adopting the above steps, the present invention can effectively avoid the phenomenon of cold wind when the heat pump system is turned on in the heating mode, thereby effectively ensuring the heating effect of the heat pump system when it is turned on, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0044] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

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

[0046] Figure 2 is a flowchart of steps of a cold wind prevention control method according to an embodiment of the present invention;

[0047] Figure 3 The present invention is a logic judgment flow chart of a cold wind prevention control method according to an embodiment of the present invention.

[0048] Description of reference numerals:

[0049] 100. heat pump system; 110. heat pump unit; 120. water outlet pipeline; 121. control valve; 122. first rubber flexible connector; 123. first pressure detection component; 124. first control valve; 125. auxiliary heating component; 130. water inlet pipeline; 131. electric valve; 132. second rubber flexible connector; 133. drain valve; 134. second pressure detection component; 135. second control valve; 136. third control valve; 137. drive component; 138. filter; 139. fourth control valve; 140. terminal heat exchanger; 150. master control valve; 160. automatic exhaust valve; 170. first temperature detection component; 180. second temperature detection component; 190. water supply pipeline; 200. regulating valve. DETAILED DESCRIPTION

[0050] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "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 only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0054] 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 are intended to be used 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, a water outlet pipeline 120, a water inlet pipeline 130, and a plurality of terminal heat exchangers 140. The terminal heat exchanger 140 may include but is not limited to a fan coil unit, and a fan coil fan is provided in the terminal heat exchanger 140, and the number of the terminal heat exchanger 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 water outlet pipe 120 is connected to the water outlet of the heat pump unit 110, and the end of the water outlet pipe 120 is provided with N water outlets, each of which is connected to the inlet of a corresponding terminal heat exchanger 140. Wherein, N is any integer greater than or equal to 2.

[0058] The outlet of the water inlet pipeline 130 is connected to the water inlet end of the heat pump unit 110, and the upstream end of the water inlet pipeline 130 is provided with N water inlets, and the N water inlets are correspondingly connected to the outlet end of a terminal heat exchanger 140, wherein N is any integer value greater than or equal to 2. The number of outlets on the water outlet pipeline 120 and the number of inlets on the water inlet pipeline 130 are equal to the number of the terminal heat exchangers 140.

[0059] That is to say, each terminal heat exchanger 140, the water outlet pipe 120, the water inlet pipe 130 and the heat pump unit 110 form a circulating heat exchange loop, which can directly act on the room to flexibly adjust the indoor temperature. Figure 1 As shown by the arrows in the figure, 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 temperature, such as between 35°C and 45°C, the control system needs to autonomously control the conduction of the terminal heat exchanger 140. Therefore, in each circulating heat exchange loop, that is, the pipeline between the inlet of one of the water inlet pipelines 130 and the corresponding terminal heat exchanger 140 is provided with an electric control element 131, and the electric control element 131 may include but is not limited to an electric two-way valve. In other words, the control system autonomously controls the conduction or closing of the electric two-way valve, that is, the electric control element 131, thereby improving the intelligent level of autonomous control of the heat pump system 100.

[0061] A control valve 121 is provided on the pipeline between the outlet of one of the outlet pipes 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 less frequently. When the system is repaired or installed, the electric control element 131 is closed and the control valve 121 can be closed manually to avoid a large amount of heavy water being discharged from the system. Therefore, a ball valve can be used for the control valve 121.

[0062] Each terminal heat exchanger 140 is correspondingly equipped with a temperature controller, and the set temperature of the corresponding terminal heat exchanger 140 can be controlled by the temperature controller.

[0063] It should be noted that each circulating heat exchange loop is controlled by the cold wind prevention control method of the following embodiment. The cold wind prevention control method is described in the following embodiment and will not be repeated here.

[0064] A master control valve 150 is provided on each branch pipeline of the water inlet pipeline 130 and the water outlet pipeline 120 . The master control valve 150 may include but is not limited to an electric valve, a ball valve or a stop valve.

[0065] Automatic exhaust valves 160 are respectively provided on the water inlet pipe 130 and the water outlet pipe 120 at the highest positions thereof, and the air in the pipes can be automatically discharged through the automatic exhaust valves 160. Alternatively, when there is a large air pressure in the water inlet pipe 130 or the water outlet pipe 120, that is, when the air pressure value exceeds the set exhaust value of the automatic exhaust valve 160, the pressure can be released through the automatic exhaust valve 160 to ensure the smooth circulation of the circulating water in the pipes and to ensure that the pressure in the pipes is within an appropriate range.

[0066] A first temperature detection element 170 is provided at the terminal branch of the water outlet pipeline 120. The first temperature detection element 170 may include but is not limited to a temperature sensor or a temperature and humidity sensor, etc. 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 water outlet pipeline 120, that is, the outlet water temperature.

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

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

[0069] The first pressure detection component 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 water outlet pipeline 120 .

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

[0071] The auxiliary heating element 125 is used to further heat the circulating water in the water 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] Among them, at the initial start-up of the heat pump unit 110, the operating frequency of the compressor in the heat pump unit 110 will not immediately rise to the target frequency. At this time, the auxiliary heating element 125 can be used to auxiliary heat the circulating water in the water outlet pipe 120, so that the temperature of the circulating water can rise quickly, thereby shortening the initial start-up or preparation time of the heat pump unit 110.

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

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

[0075] The second rubber flexible connector 132 is disposed close to the heat pump unit 110 , and the fourth control valve 139 is a pressure reducing valve and is disposed close to the second temperature detecting component 180 .

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

[0077] The second pressure detection component 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 water inlet pipeline 130 .

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

[0079] The driving member 137 may include but is not limited to a variable frequency water pump. Intersecting flexible connectors are provided on both sides of the driving member 137, i.e., between the inlet of the driving member 137 and the water inlet pipeline 130, and between the outlet of the driving member 137 and the water inlet pipeline 130, so as to reduce the influence of the vibration of the driving member 137 during operation on the stability of the water inlet pipeline 130.

[0080] The 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 pipeline 190 is also provided between the fourth control valve 139 and the second temperature detection member 180. It should be noted that a check valve, a filter, a control valve, etc. are provided on the water supply pipeline 190. The water supply pipeline 190 can be used to replenish circulating water for the water inlet pipeline 130, and the circulating water at least includes tap water.

[0082] A regulating valve 200 is further provided between the water outlet pipeline 120 and the water inlet pipeline 130, one end of the regulating valve 200 is provided on the water outlet pipeline 120 between the first control valve 124 and the auxiliary heating element 125, and the other end of the regulating valve 200 is provided on the water inlet pipeline 130 between the second control valve 135 and the third control valve 136. It should be noted that the regulating valve 200 is a pressure difference bypass valve, which can be used in the heat pump system 100 to balance the water pressure difference between the outlet water and the inlet water between the water outlet pipeline 120 and the water inlet pipeline 130, so as to help prevent the heat pump system 100 from being damaged due to excessive pressure difference.

[0083] In a preferred embodiment, the first rubber flexible connector 122, the first pressure detecting component 123, the first control valve 124, the second rubber flexible connector 132, the drain valve 133, the second pressure detecting component 134, the second control valve 135, the third control valve 136, the driving component 137, the filter 138, the fourth control valve 139 and the regulating valve 200 can all be integrated in an installation box to form a variable frequency hydraulic module, so as to reduce the installation workload of the heat pump system 100 and reduce the installation and commissioning costs of the heat pump system 100.

[0084] like Figure 2 As shown, an exemplary embodiment of the present invention further provides a heat pump unit cold wind prevention control method, the heat pump unit cold wind prevention control method comprising the following steps:

[0085] Step S100: obtaining a first outlet water temperature of circulating water in the outlet water pipeline.

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

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

[0088] Step S400: selectively controlling the operating states of the compressor and the circulating pump and the conduction state of the electronic control element according to the second outlet water temperature.

[0089] In step S100, when the air in the room needs to be heated, the heat pump system 100 is set to operate in a heating mode through the corresponding thermostat. At this time, the first outlet water temperature T1 of the circulating water in the outlet water pipe 120 can be detected at a first time interval by the first temperature detection member 170 set on the outlet water pipe 120. The value of the first time can be 1s. That is, the control system of the heat pump system 100 obtains the temperature value of the first outlet water temperature T1 once every 1 second.

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

[0091] The control system of the heat pump system 100 may adopt a control system in the prior art, as long as the control system can control various startup functions of the heat pump system 100, and the specific structure type and specific control strategy of the control system will not be repeated here.

[0092] In step S200, there is heat loss due to the circulation of circulating water in the outlet pipe 120, and the 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 of the first outlet water temperature T1 flows to the position of the terminal heat exchanger 140, the circulating water of this temperature value exchanges heat with the air, and the temperature of the heated air meets the temperature value set by the thermostat. At this time, the electric control element 131 is turned on, so that the indoor air is heated by the terminal heat exchanger 140.

[0093] When the heated circulating water provided by the heat pump unit 110 flows to the terminal heat exchanger 140, the fan arranged at the terminal heat exchanger 140 is started, and the indoor cold air exchanges heat with the heated circulating water after passing through the terminal heat exchanger 140, thereby heating the indoor cold air.

[0094] The value of the first setting value A may be 35°C. Of course, the value of the first setting value may also be other values ​​besides 35°C, such as 34°C, 34.5°C, 35.5°C, and 36°C. It should be noted that the first setting value A may be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the first setting value A may gradually increase with the increase of the altitude, or the first setting value A may also gradually increase with the increase of the north latitude of the user's location.

[0095] In step S300, after the first detection of the first outlet water temperature T1, 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 in the terminal heat exchanger 140 at the end of the outlet water pipeline 120, which may cause the temperature value of the first outlet water temperature T1 to drop next time, and there is still a possibility of blowing cold air later. 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 pipeline 120 again through the first temperature detection member 170 set on the outlet water pipeline 120.

[0096] In step S400, the operating states of the compressor and the circulating pump and the conduction state 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 pipeline 120 fails to meet the subsequent heating requirements for the air, that is, the temperature value of the cold air heated by the circulating water of the second outlet water temperature T2 in the terminal heat exchanger 140 cannot meet the temperature value set by the user through the thermostat. At this time, the cold air after heat exchange is still slightly higher in temperature. At this time, the control system controls the control valve 121 between the terminal heat exchanger 140 and the outlet water pipeline 120 to be closed to prevent the cold air from blowing out. Then, the circulating water in the outlet water pipeline 120 can be further heated by increasing the operating frequency of the compressor or by the auxiliary heating element 125 to increase the temperature value of the second outlet water temperature T2. Until the temperature value of the second water outlet 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 water inlet pipe 130 is controlled to be turned on. At the same time, the fan of the air disc is controlled to be turned on, so as 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 electric control element 141 between the terminal heat exchanger 140 and the water inlet pipe 130 is controlled to be turned on, and at the same time, the fan of the air disc is turned on.

[0099] It should be noted that the value of the second setting value B can be 45°C. Of course, the value of the second setting value B can also be other values ​​besides 45°C, such as 44°C, 44.5°C, 45.5°C and 46°C. It should be noted that the second setting value B can be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the second setting value B can gradually increase with the increase of the altitude, or the second setting value B can also gradually increase with the increase of the north 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 water pipeline 120 is too high, which may or may cause the subsequent heat exchange temperature to be higher, which will increase the energy consumption of the heat pump system 100 and cause discomfort to the user. At this time, based on the control system, the compressor operating frequency is controlled to remain unchanged, and the operating gear of the circulating pump is gradually increased to appropriately reduce the temperature value of the second outlet water temperature T2. For example, the operating gear of the circulating pump is modulated from low gear to medium gear, etc. During this period, the second outlet water temperature T2 of the circulating water in the outlet water pipeline 120 is continuously detected 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, and then the electric control element 131 between the terminal heat exchanger 140 and the water inlet pipeline 130 is controlled to open, and at the same time, the fan of the wind disk is controlled to start.

[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 turned on, and improving the user experience.

[0102] like Figure 3 As shown, in some embodiments, selectively controlling the operating state of the compressor and the circulating pump and the conduction state of the electronic control element according to the second outlet water temperature T2 includes the following schemes:

[0103] When the second outlet water temperature T2 is lower than the first set value A, the electronic control element 131 is controlled to be turned off, 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 electronic control element 131 and the fan disc fan are controlled to turn on, the operating frequency of the compressor is increased, the gear position of the circulating pump is kept unchanged, or the circulating pump is controlled to shift up.

[0105] When the second outlet water temperature T2 is greater than the second set value B, the electronic control element 131 and the fan disc fan are controlled to turn on, the operating frequency of the compressor is kept unchanged, and at the same time, the circulating pump is controlled to shift up.

[0106] In one example, when the second outlet water temperature T2 is less than the first set value A, that is, T2 < A, it indicates that the temperature of the circulating water in the outlet water pipeline 120 fails to meet the subsequent heating requirements for the air, that is, the temperature value of the cold air heated by the circulating water at the second outlet water temperature T2 in the terminal heat exchanger 140 cannot meet the temperature value set by the user through the thermostat, and the cold air after heat exchange is still slightly higher in temperature. At this time, the following methods can be used:

[0107] First, the control system controls the electronic control element 131 and the fan of the wind disk to be turned off, and at the same time, increases the operating frequency of the compressor in a manner of increasing the predetermined frequency at intervals of a preset time, for example, controls the compressor to operate in a mode of increasing the predetermined frequency at intervals of a second time. Among them, the value of the second time can be 60s, or the value of the second time can also be other time values ​​other than 60s, for example, any value between 50s and 70s. The second time can be flexibly set according to the spatial position or altitude of the heat pump system 100. For example, the second time can gradually increase with the increase of the altitude, or the second time can also gradually increase with the increase of the north latitude of the user's location.

[0108] The value range of the predetermined frequency may be between 2 Hz and 8 Hz, and preferably, the value of the predetermined frequency is 5 Hz. That is, the frequency of the compressor is increased by 5 Hz every 60 seconds.

[0109] Then, at every first time 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 component 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 air disk fan are controlled to turn on, so as to realize the heating process of the indoor cold air through the terminal heat exchanger 140. In the initial stage of this process, that is, during the startup of the heating mode, direct blowing of cold air will not occur at the position of 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, that is, A≤T2≤B, it means that after the circulating water of this temperature value flows to the position of the terminal heat exchanger 140, after the circulating water of this temperature value exchanges heat with the air, the temperature of the heated air meets the temperature value set by the thermostat. At this time, the following method can be used:

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

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

[0113] In a specific example, the temperature difference change rate 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 represent the outlet water temperature of the heated circulating water entering the outlet water pipeline 120;

[0116] T 进 It is used to represent the inlet water temperature of the circulating water returned to the inlet pipe 130 after heat exchange in the terminal heat exchanger 140;

[0117] △t is used to represent the difference between the time of the current detected water outlet temperature and the time of the water inlet temperature and the time of the last detected water outlet temperature and the time of the water inlet temperature.

[0118] When the temperature difference change rate K is less than the preset threshold value C, it indicates that the temperature value of the circulating water at this time can meet the subsequent heating requirements, but the temperature value of the circulating water is still slightly low, and the temperature value of the circulating water needs to be further increased. At this time, the control system controls the electronic control element 131 and the fan of the wind disk to turn on, and the compressor to operate in a mode of increasing the predetermined frequency every third time interval, while keeping the operating gear of the circulating pump unchanged. The value of the preset threshold value C may include 0.5.

[0119] The value of the third time may be 60s, or the value of the third time may be other time values ​​other than 60s, for example, any value between 50s and 70s. The third time may be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the third time may gradually increase with the increase of the altitude, or the third time may gradually increase with the increase of the north latitude of the user's location.

[0120] During the compressor up-frequency operation, the temperature difference change rate K of the circulating water continues to be obtained 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 temperature difference change rate K is greater than or equal to the preset threshold value C, it indicates that the temperature value of the circulating water at this time meets the subsequent heating requirements and the temperature is appropriate. At this time, the control system controls the electronic control element 131 and the fan fan to turn on, and at the same time controls the circulating pump to increase one gear every fourth time interval in a frequency-increasing manner until the operating gear of the circulating pump reaches the target gear. Among them, the circulating pump will be more energy-efficient when it runs at the target gear.

[0122] When the circulating pump increases its gear by increasing its frequency, the temperature of the circulating water in the water inlet pipe 130 will decrease, thereby causing the temperature of the circulating water subsequently entering the water outlet pipe 120 to decrease. Therefore, when the circulating pump increases its gear, the control system controls the compressor to operate in a mode of increasing the predetermined frequency every fourth time interval until the operating frequency of the compressor reaches the target frequency.

[0123] The value of the fourth time may be 30s, or the value of the fourth time may be other time values ​​other than 30s, for example, any value between 20s and 40s. The fourth time may be flexibly set according to the spatial location or altitude of the heat pump system 100. For example, the fourth time may gradually increase with the increase of the altitude, or the fourth time may also gradually increase with the increase of the north 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, that is, T2>B, it indicates that the temperature of the circulating water in the outlet water pipeline 120 is too high, which may cause the subsequent heat exchange temperature to be higher, which will increase the energy consumption of the heat pump system 100 and cause discomfort to the user. At this time, the following method can be used:

[0125] First, the control system controls the electronic control element 131 and the fan of the wind disk to turn on, and controls the circulating pump to increase one gear in a frequency-increasing manner every fifth time interval, while keeping the operating frequency of the compressor unchanged. In other words, by increasing the operating gear and operating frequency of the circulating pump, the temperature value of the circulating water in the water inlet pipeline 130 is appropriately reduced, and then the temperature value of the second water outlet temperature T2 of the circulating water in the water outlet pipeline 120 is reduced, so that when the subsequent circulating water and the cold air are heat-exchanged, the temperature value of the heated cold air is guaranteed to be within the temperature range set by the thermostat, so as to improve the user experience.

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

[0127] Then, the fourth outlet water temperature of the circulating water in the outlet water pipeline 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 step is performed, that is, the operation in the above example of A≤T2≤B is performed.

[0128] like Figure 3 As shown, in some embodiments, before obtaining the first outlet water temperature T1, the cold wind prevention 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 the 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 a heating mode to heat the circulating water flowing through the heat pump system 100 .

[0131] An exemplary embodiment of the present invention further 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. The computer executable instructions can be called by the processor and execute the cold wind prevention control method in any of the above embodiments.

[0132] The heat pump system 100 may also include the electronic device of the above-mentioned embodiment.

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

[0134] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A cold wind prevention control method, applied to a heating mode of a heat pump system, the heat pump system comprising a heat pump assembly, a water outlet pipeline, a water inlet pipeline and a terminal heat exchanger, the heat pump assembly being provided with a compressor, the water outlet end of the heat pump assembly being communicated with the inlet of the water outlet pipeline, one of the outlets of the water outlet pipeline being communicated with the inlet of the terminal heat exchanger, the outlet of the terminal heat exchanger being communicated with the inlet of the water inlet pipeline, one of the outlets of the water inlet pipeline being communicated with the water inlet end of the heat pump assembly, wherein: The water inlet pipeline is provided with a driving member for promoting the circulation of circulating water, and an electric control element is provided between the water inlet pipeline and the terminal heat exchanger, characterized in that the cold wind prevention control method comprises: Acquiring a first outlet water temperature of the circulating water in the outlet water pipeline; When the first outlet water temperature is greater than or equal to a first set value, the electric control element is controlled to turn on, so as to heat the indoor air by using the terminal heat exchanger; obtaining again a second outlet water temperature of the circulating water in the outlet water pipeline; The operating states of the compressor and the circulating pump and the conduction state of the electronic control element are selectively controlled according to the second outlet water temperature.

2. The cold wind prevention control method according to claim 1, characterized in that: The terminal heat exchanger is provided with a fan disc fan; The selectively controlling the operating states of the compressor and the circulating pump and the conduction state of the electronic control element according to the second outlet water temperature includes: When the second outlet water temperature is lower than a first set value, the electronic control element is controlled to be turned off, 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 element and the fan fan are controlled to turn on, the operating frequency of the compressor is increased, the gear position of the circulating pump is kept unchanged, or the circulating pump is controlled to shift up; When the second outlet water temperature is greater than the second set value, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is kept unchanged, and at the same time, the circulating pump is controlled to shift up.

3. The cold wind prevention control method according to claim 2, characterized in that: When the second outlet water temperature is less than a first set value, controlling the electric control element to close and increasing the operating frequency of the compressor comprises: Increasing the operating frequency of the compressor by increasing the predetermined frequency at predetermined intervals; The third outlet water temperature of the circulating water flowing into the outlet water pipeline is obtained, and 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 of the air disc are controlled to turn on.

4. The cold wind prevention control method according to claim 2, characterized in that: 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 element and the fan fan are controlled to start, the operating frequency of the compressor is increased, the gear position of the circulating pump is kept unchanged, or the circulating pump is controlled to shift up, including: Obtaining a temperature difference change rate of the circulating water, wherein the temperature change rate is used to characterize a temperature change of the circulating water in the water outlet pipeline and the water inlet pipeline of the heat pump system within an interval time difference; When the temperature difference change rate is less than a preset threshold, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is increased, and the gear position of the circulating pump is kept unchanged; When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control element and the fan disc fan are controlled to turn on, the operating frequency of the compressor is increased, and the circulating pump is controlled to shift up.

5. The cold wind prevention control method according to claim 4, characterized in that: The temperature difference change rate is positively correlated with the difference between the outlet water temperature of the circulating water in the outlet water pipeline and the inlet water temperature of the circulating water in the inlet water pipeline; as well as, The temperature difference change rate is negatively correlated with the difference between the time of the currently detected water outlet temperature and the time of the water inlet temperature and the time of the last detected water outlet temperature and the time of the water inlet temperature.

6. The cold wind prevention control method according to claim 4, characterized in that: When the temperature difference change rate is less than a preset threshold, the electric control element and the fan disc fan are controlled to start, the operating frequency of the compressor is increased, and the gear position of the circulating pump is kept unchanged, including: The operating frequency of the compressor is increased by increasing the predetermined frequency at predetermined intervals, while the operating gear position of the circulation pump is kept unchanged.

7. The cold wind prevention control method according to claim 4, characterized in that: When the temperature difference change rate is greater than or equal to the preset threshold, the electronic control element and the fan fan are controlled to start, the operating frequency of the compressor is increased, and the circulating pump is controlled to shift up, including: Controlling the circulating pump to increase one gear in a frequency-increasing manner until the operating gear of the circulating pump reaches a target gear; and, The compressor is controlled to operate in a mode of increasing a predetermined frequency until the operating frequency of the compressor reaches a target frequency.

8. The cold wind prevention control method according to any one of claims 2 to 7, characterized in that: When the second outlet water temperature is greater than the second set value, the electronic control element and the fan fan are controlled to be turned on, the operating frequency of the compressor is kept unchanged, and at the same time, the circulating pump is controlled to shift up, including: Control the circulating pump to increase the frequency by one gear, during which the compressor is controlled to continue to operate at the current operating frequency; A fourth outlet water temperature of the circulating water in the outlet water pipeline is obtained, and 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, the next step is performed.

9. The cold wind prevention control method according to claim 1, characterized in that: Before the step of obtaining the first outlet water temperature of the circulating water in the outlet water pipeline, the cold wind prevention control method further includes the following steps: In response to an instruction that the heat pump system operates in a heating mode, controlling the circulation pump to start at a low frequency; The heat pump system is controlled to operate in the heating mode to heat circulating water flowing through the heat pump system.

10. An electronic device, characterized in that: The electronic device comprises: a memory for storing one or more computer executable instructions; A processor is used to call and execute computer executable instructions in the memory, so as to implement the cold wind prevention control method as described in any one of claims 1 to 9.

11. A heat pump system, characterized in that: Using the cold wind prevention control method as claimed in any one of claims 1 to 9 for control; or The heat pump system comprises the electronic device according to claim 10 .

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