Control method and device for heat pump system, heat pump system and computer readable storage medium

Abstract

The invention relates to the technical field of heat pumps, and discloses a control method for a heat pump system, the heat pump system comprises an outdoor unit and an indoor unit, and the indoor unit comprises an air conditioner heat exchanger and a floor heating capillary tube which are arranged in parallel; the method comprises the steps that under the condition that the heat pump system operates in a heating mode, a target heat exchange component is determined from an air conditioner heat exchanger and a floor heating capillary tube, a flow path where the target heat exchange component is located is controlled to be conducted, and a flow path where a non-target heat exchange component is located is controlled to be cut off; and under the condition that the defrosting entering condition is met, the flow path where the target heat exchange component is located is controlled to be separated, the flow path where the non-target heat exchange component is located is controlled to be communicated, and the heat pump system is controlled to operate in a defrosting mode. The situation that the subsequent heating effect is affected by sudden temperature drop of the target heat exchange component during defrosting can be avoided, and the fluctuation degree of the indoor temperature before and after defrosting can be reduced, so that the comfortable experience of indoor users is better guaranteed. The invention further discloses a control device for the heat pump system, the heat pump system and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, for example, to a control method and device for a heat pump system, a heat pump system, and a computer-readable storage medium. Background Art

[0002] At present, the outdoor unit of a heat pump air conditioner needs to be defrosted when it is in heating mode. When the frost on the outdoor unit coil accumulates to a certain extent, it needs to be defrosted periodically to restore the heating capacity of the air conditioner. To this end, the relevant technology proposes to switch the air conditioner from heating mode to cooling mode for defrosting.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] Related technologies can use high-temperature refrigerant to melt the frost on the outdoor unit coil, but at this time, the indoor temperature switches from heating to cooling, and the cold released by the indoor heat exchanger will cause the indoor temperature to drop rapidly, resulting in large indoor temperature fluctuations. This will cause indoor users to experience alternating hot and cold temperatures, reducing their comfort.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a control method and device for a heat pump system, a heat pump system, and a computer-readable storage medium, which can reduce the fluctuation of indoor temperature before and after defrosting to better ensure the comfort experience of indoor users.

[0008] In some embodiments, the heat pump system includes an outdoor unit and an indoor unit, and the indoor unit includes an air-conditioning heat exchanger and a floor heating capillary arranged in parallel; the control method includes: when the heat pump system operates in a heating mode, determining the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary, and controlling the flow path where the target heat exchange component is located to be conductive, and controlling the flow path where the non-target heat exchange component is located to be blocked; when the defrost entry conditions are met, controlling the flow path where the target heat exchange component is located to be blocked, controlling the flow path where the non-target heat exchange component is located to be conductive, and controlling the heat pump system to operate in a defrost mode.

[0009] In some embodiments, the control device includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned control method for the heat pump system when running the program instructions.

[0010] In some embodiments, the heat pump system includes: an outdoor unit; an indoor unit, including an air conditioning heat exchanger and a floor heating capillary arranged in parallel; the above-mentioned control device for the heat pump system is electrically connected to the flow path where the air conditioning heat exchanger is located and the flow path where the floor heating capillary is located, respectively.

[0011] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are executed, the computer is used to execute the above-mentioned control method for the heat pump system.

[0012] The control method, device, heat pump system, and computer-readable storage medium for a heat pump system provided in the embodiments of the present disclosure can achieve the following technical effects:

[0013] In the disclosed embodiment, an air-conditioning heat exchanger and a floor heating capillary are arranged in parallel in the indoor unit. The air-conditioning heat exchanger can quickly increase the indoor temperature through convective heat exchange to improve the heating efficiency of the heat pump system. The floor heating capillary can ensure the uniformity of the indoor temperature through radiation heat exchange to improve the heating comfort of the heat pump system. During the heating operation of the heat pump system, the disclosed embodiment can select one of the air-conditioning heat exchanger and the floor heating capillary as the target heat exchange component, and control the flow path where the target heat exchange component is located to be conductive, while controlling the flow path where the non-target heat exchange component is located to be blocked, so that a more suitable target heat exchange component can be used under the current heating process to achieve a better heating effect. In addition, the embodiment of the present disclosure also periodically defrosts the outdoor unit. When it is determined that the heat pump system meets the defrost entry conditions, the embodiment of the present disclosure can control the isolation of the flow path where the target heat exchange component is located, and instead control the flow path where the non-target heat exchange component is located to be connected, so that the non-target heat exchange component can be used as an evaporation device during defrosting operation, thereby avoiding the sudden drop in temperature of the target heat exchange component during defrosting and affecting the subsequent heating effect, which is beneficial to reducing the fluctuation of indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users.

[0014] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0016] Figure 1 is a structural schematic diagram of a heat pump system provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram of a control method for a heat pump system provided by an embodiment of the present disclosure;

[0018] Figure 3 is a schematic diagram of another control method for a heat pump system provided by an embodiment of the present disclosure;

[0019] Figure 4 is a schematic diagram of another control method for a heat pump system provided by an embodiment of the present disclosure;

[0020] Figure 5 is a schematic diagram of another control method for a heat pump system provided by an embodiment of the present disclosure;

[0021] Figure 6 It is a schematic diagram of a control device for a heat pump system provided in an embodiment of the present disclosure.

[0022] Reference numerals:

[0023] 10: compressor; 20: four-way valve; 30: outdoor heat exchanger; 40: air conditioning heat exchanger; 50: floor heating capillary; 60: three-way valve; 71: first control valve; 72: second control valve; 80: external unit throttle valve; 91: first stop valve; 92: second stop valve; 100: outdoor unit; 200: indoor unit; 300: control device for heat pump system; 301: processor; 302: memory; 303: communication interface; 304: bus. DETAILED DESCRIPTION

[0024] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0025] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0026] Unless otherwise stated, the term "plurality" means two or more.

[0027] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0028] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0029] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0030] Combination Figure 1 As shown, the embodiment of the present disclosure provides a heat pump system, including: an outdoor unit 100 and an indoor unit 200. The indoor unit 200 includes an air conditioning heat exchanger 40 and a floor heating capillary 50 arranged in parallel.

[0031] With the heat pump system provided by the embodiment of the present disclosure, the air conditioning heat exchanger 40 can quickly increase the indoor temperature through convective heat exchange to improve the heating efficiency of the heat pump system. The floor heating capillary tube 50 can ensure the uniformity of the indoor temperature through radiation heat exchange to improve the heating comfort of the heat pump system. During the heating operation of the heat pump system, the embodiment of the present disclosure can comprehensively consider the heating characteristics of the air conditioning heat exchanger 40 and the floor heating capillary tube 50, and select appropriate heat exchange components under different heating processes to better exert the heating effect of the heat pump system.

[0032] Optionally, the outdoor unit 100 includes a compressor 10, a four-way valve 20, and an outdoor heat exchanger 30 connected in sequence. In this way, the outdoor unit 100 and the indoor unit 200 can be connected through a refrigerant pipeline to form a refrigerant circulation loop, and the specific flow direction of the refrigerant can be switched through the four-way valve 20 to reasonably adjust the operation mode of the heat pump system.

[0033] Optionally, the indoor unit 200 further includes a three-way valve 60. The three-way valve 60 is disposed at the connection point between the inlet pipeline of the air-conditioning heat exchanger 40 and the inlet pipeline of the floor heating capillary tube 50 in the heating mode. In this way, in the heating mode, the on-off state of the flow path where the air-conditioning heat exchanger 40 is located and the flow path where the floor heating capillary tube 50 is located can be controlled by the three-way valve 60, so as to select appropriate heat exchange components in different processes to better exert the heating effect of the heat pump system.

[0034] Optionally, the indoor unit 200 further includes a first control valve 71 and a second control valve 72. The first control valve 71 is provided at the outlet pipe of the air conditioning heat exchanger 40 in the heating mode. The second control valve 72 is provided at the outlet pipe of the floor heating capillary tube 50 in the heating mode. In this way, in the defrosting mode, the first control valve 71 and the second control valve 72 can be used to control the on-off status of the flow path where the air conditioning heat exchanger 40 is located and the flow path where the floor heating capillary tube 50 is located, so as to select appropriate defrosting components in different processes to better ensure the heating effect of the heat pump system.

[0035] Optionally, the outdoor unit 100 further includes an outdoor unit throttle valve 80. The outdoor unit throttle valve 80 is disposed in the inlet pipeline of the outdoor heat exchanger 30 in the heating mode. In this way, the working state of the outdoor heat exchanger 30 can be controlled by adjusting the opening of the outdoor unit throttle valve 80 to ensure reliable operation of the heat pump system.

[0036] Optionally, the heat pump system further includes a first stop valve 91 and a second stop valve 92. The first stop valve 91 and the second stop valve 92 are both disposed between the outdoor unit 100 and the indoor unit 200. In this way, the liquid pipe and the gas pipe of the heat pump system can be completely closed or opened by the first stop valve 91 and the second stop valve 92, which is conducive to ensuring the reliable operation of the heat pump system.

[0037] Optionally, the heat pump system further includes a control device 300 for the heat pump system. The control device 300 for the heat pump system is electrically connected to the flow path where the air conditioning heat exchanger 40 is located and the flow path where the floor heating capillary tube 50 is located. In this way, the embodiment of the present disclosure can execute a corresponding control method through the control device 300 to better exert the heating effect of the heat pump system.

[0038] Based on the above heat pump system, combined with Figure 2 As shown, the embodiment of the present disclosure provides a control method for a heat pump system, comprising:

[0039] S101, when the heat pump system operates in heating mode, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary tube, and controls the flow path where the target heat exchange component is located to be connected, and controls the flow path where the non-target heat exchange component is located to be blocked.

[0040] S102, when the defrost entry conditions are met, the control device controls the flow path where the target heat exchange component is located to be blocked, controls the flow path where the non-target heat exchange component is located to be connected, and controls the heat pump system to operate in a defrost mode.

[0041] Using the control method for a heat pump system provided by the embodiment of the present disclosure, an air conditioning heat exchanger and a floor heating capillary are arranged in parallel in the indoor unit. The air conditioning heat exchanger can quickly increase the indoor temperature through convective heat exchange to improve the heating efficiency of the heat pump system. The floor heating capillary can ensure the uniformity of the indoor temperature through radiation heat exchange to improve the heating comfort of the heat pump system. During the heating operation of the heat pump system, the embodiment of the present disclosure can select one of the air conditioning heat exchanger and the floor heating capillary as the target heat exchange component, and control the flow path where the target heat exchange component is located to be conductive, while controlling the flow path where the non-target heat exchange component is located to be blocked, so that a more suitable target heat exchange component can be used under the current heating process to achieve a better heating effect. In addition, the embodiment of the present disclosure also periodically defrosts the outdoor unit. When it is determined that the heat pump system meets the defrost entry conditions, the embodiment of the present disclosure can control the isolation of the flow path where the target heat exchange component is located, and instead control the flow path where the non-target heat exchange component is located to be connected, so that the non-target heat exchange component can be used as an evaporation device during defrosting operation, thereby avoiding the sudden drop in temperature of the target heat exchange component during defrosting and affecting the subsequent heating effect, which is beneficial to reducing the fluctuation of indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users.

[0042] Optionally, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary tube, including: the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary tube according to the current indoor temperature difference; and / or the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary tube according to the current heating time.

[0043] In this way, the embodiment of the present disclosure can determine the heating process of the heat pump system in combination with the current indoor temperature difference and / or the current heating duration, so that appropriate heat exchange components can be selected under different heating processes to better exert the heating effect of the heat pump system.

[0044] Optionally, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary according to the current indoor temperature difference, including: when the current indoor temperature difference is greater than the preset indoor temperature difference, the control device determines that the target heat exchange component is the air-conditioning heat exchanger; or, when the current indoor temperature difference is less than or equal to the preset indoor temperature difference, the control device determines that the target heat exchange component is the floor heating capillary.

[0045] In this way, the embodiment of the present disclosure can obtain the target temperature set by the user and the real-time return air temperature of the room, and calculate the difference between the two, so as to obtain the current indoor temperature difference. When the current indoor temperature difference is greater than the preset indoor temperature difference, it indicates that the indoor temperature is far from the target temperature set by the user, corresponding to the early stage of the heating process, when the indoor temperature is generally low. Therefore, the embodiment of the present disclosure can select the air-conditioning heat exchanger as the target heat exchange component of the heat pump system at the early stage of the heating process, so that the indoor temperature can be quickly increased by convective heat exchange, which is conducive to significantly improving the heating efficiency at the early stage of heating. When the current indoor temperature difference is less than or equal to the preset indoor temperature difference, it indicates that the indoor temperature is closer to the target temperature set by the user, corresponding to the late stage of the heating process, when the indoor temperature is relatively high. Therefore, the embodiment of the present disclosure can select the floor heating capillary as the target heat exchange component of the heat pump system at the late stage of the heating process, so that the uniformity of the indoor temperature can be guaranteed by radiant heat exchange, which is conducive to significantly improving the heating comfort at the late stage of heating. Therefore, the embodiment of the present disclosure can select suitable heat exchange components under different heating processes to better exert the heating effect of the heat pump system.

[0046] Optionally, the preset indoor temperature difference can be set in combination with the operating parameters of the heat pump system. Preferably, the preset indoor temperature difference can be set to 3°C to better ensure the user's comfort. The preset indoor temperature difference can also be adjusted according to the actual needs of the user, and can also be set to any other reasonable value such as 1°C or 5°C.

[0047] Optionally, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary according to the current heating time, including: when the current heating time is less than the preset heating time, the control device determines that the target heat exchange component is the air-conditioning heat exchanger; or, when the current heating time is greater than or equal to the preset heating time, the control device determines that the target heat exchange component is the floor heating capillary.

[0048] In this way, the embodiment of the present disclosure can count the cumulative duration of the power-on operation of the heating mode of the heat pump system, so as to obtain the current heating duration. When the current heating duration is less than the preset heating duration, it indicates that the heat pump system has just started to run this heating mode, corresponding to the initial stage of the heating process, and the indoor temperature is generally low at this time. Therefore, the embodiment of the present disclosure can select the air-conditioning heat exchanger as the target heat exchange component of the heat pump system at the initial stage of the heating process, so that the indoor temperature can be quickly increased by convective heat exchange, which is conducive to significantly improving the heating efficiency at the initial stage of heating. When the current heating duration is greater than or equal to the preset heating duration, it indicates that the heat pump system has been running this heating mode for a long time, corresponding to the late stage of the heating process, and the indoor temperature is relatively high at this time. Therefore, the embodiment of the present disclosure can select the floor heating capillary as the target heat exchange component of the heat pump system at the late stage of the heating process, so that the uniformity of the indoor temperature can be guaranteed by radiant heat exchange, which is conducive to significantly improving the heating comfort at the late stage of heating. Therefore, the embodiment of the present disclosure can select suitable heat exchange components under different heating processes to better exert the heating effect of the heat pump system.

[0049] Optionally, the preset heating time can be set in combination with the operating parameters of the heat pump system. Preferably, the preset heating time can be set to 30 minutes to better ensure the user's comfort. The preset heating time can also be adjusted according to the actual needs of the user, and can also be set to any other reasonable value such as 20 minutes or 60 minutes.

[0050] Optionally, when the heat pump system operates in heating mode, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary, and controls the flow path where the target heat exchange component is located to be conducted, and controls the flow path where the non-target heat exchange component is located to be blocked, including: when the heat pump system operates in heating mode, the control device determines that the target heat exchange component is the floor heating capillary, and controls the flow path where the floor heating capillary is located to be conducted, and controls the flow path where the air-conditioning heat exchanger is located to be blocked; or, when the heat pump system operates in heating mode, the control device determines that the target heat exchange component is the air-conditioning heat exchanger, and controls the flow path where the air-conditioning heat exchanger is located to be conducted, and controls the flow path where the floor heating capillary is located to be blocked.

[0051] In this way, during the heating operation of the heat pump system, corresponding to the initial stage of the heating process, the embodiment of the present disclosure can determine the air conditioning heat exchanger as the target heat exchange component, and control the flow path where the air conditioning heat exchanger is located to be conductive, and control the flow path where the floor heating capillary is located to be blocked, so that only the air conditioning heat exchanger is involved in the heat exchange work, so as to quickly increase the indoor temperature through convective heat exchange, which is conducive to significantly improving the heating efficiency of the heat pump system. And corresponding to the later stage of the heating process, the embodiment of the present disclosure can determine the floor heating capillary as the target heat exchange component, and control the flow path where the floor heating capillary is located to be conductive, and control the flow path where the air conditioning heat exchanger is located to be blocked, so that only the floor heating capillary is involved in the heat exchange work, so as to ensure the uniformity of the indoor temperature through radiation heat exchange, which is conducive to significantly improving the heating comfort of the heat pump system.

[0052] Optionally, the control device controls the isolation of the flow path where the target heat exchange component is located, controls the conduction of the flow path where the non-target heat exchange component is located, and controls the heat pump system to operate in a defrost mode, including: the control device controls the isolation of the flow path where the floor heating capillary is located, controls the conduction of the flow path where the air-conditioning heat exchanger is located, to control the heat pump system to operate in a first defrost mode; or, the control device controls the isolation of the flow path where the air-conditioning heat exchanger is located, controls the conduction of the flow path where the floor heating capillary is located, to control the heat pump system to operate in a second defrost mode.

[0053] In this way, during the heating operation of the heat pump system, if a defrost signal is received at the beginning of the heating process, the embodiment of the present disclosure can control the heat pump system to operate in the second defrost mode, and control the flow path where the air conditioner heat exchanger is located to be cut off, and control the flow path where the floor heating capillary is located to be connected, so that the floor heating capillary is used as an evaporation device during the defrost operation. In this way, the temperature of the air conditioner heat exchanger participating in the heat exchange work in the early stage of heating can be prevented from dropping suddenly to affect its subsequent heating effect, which is conducive to reducing the fluctuation of the indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users. When a defrost signal is received at the end of the heating process, the embodiment of the present disclosure can control the heat pump system to operate in the first defrost mode, and control the flow path where the floor heating capillary is located to be cut off, and control the flow path where the air conditioner heat exchanger is located to be connected, so that the air conditioner heat exchanger is used as an evaporation device during the defrost operation. In this way, the temperature of the floor heating capillary participating in the heat exchange work in the late stage of heating can be prevented from dropping suddenly to affect its subsequent heating effect, which is conducive to reducing the fluctuation of the indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users.

[0054] Specifically, when the heat pump system is in defrosting mode, the four-way valve can be controlled to make the refrigerant flow in the direction of the cooling mode, so that the high-temperature refrigerant discharged from the compressor can be used to melt the frost layer on the outdoor heat exchanger, thereby achieving the defrosting operation of the outdoor unit.

[0055] Optionally, the control device determines that the defrost entry condition is met in the following manner: the control device detects that the coil temperature of the outdoor heat exchanger is less than or equal to the first coil temperature. The first coil temperature is less than the outdoor ambient temperature. In this way, when the coil temperature of the outdoor heat exchanger is less than or equal to the first coil temperature, it indicates that the coil temperature of the outdoor heat exchanger is much lower than the outdoor ambient temperature at this time, and it can be determined that the outdoor unit meets the defrost entry condition. At this time, the heat pump system can be controlled to turn on the defrost mode to defrost the outdoor unit.

[0056] Preferably, the first coil temperature is equal to the outdoor ambient temperature minus a preset temperature difference. The preset temperature difference can be set to 12° C. Then the defrost entry condition is: the coil temperature of the outdoor heat exchanger is less than or equal to the outdoor ambient temperature minus 12° C.

[0057] Based on the above heat pump system, combined with Figure 3As shown, the embodiment of the present disclosure provides another control method for a heat pump system, comprising:

[0058] S201, when the heat pump system operates in heating mode, the control device determines that the target heat exchange component is a floor heating capillary tube, and controls the flow path where the floor heating capillary tube is located to be conductive, and controls the flow path where the air conditioning heat exchanger is located to be blocked.

[0059] S202, when the defrost entry conditions are met, the control device controls the inlet pipeline of the floor heating capillary tube to be connected, controls the outlet pipeline of the floor heating capillary tube to be isolated, and controls the heat pump system to continue to operate in the heating mode for the target heat storage time.

[0060] S203, the control device controls the flow path where the floor heating capillary tube is located to be blocked, and controls the flow path where the air-conditioning heat exchanger is located to be connected, so as to control the heat pump system to operate in the first defrost mode.

[0061] By adopting the control method for the heat pump system provided by the embodiment of the present disclosure, in the later stage of the heating operation of the heat pump system, the embodiment of the present disclosure can determine the floor heating capillary as the target heat exchange component, and control the flow path where the floor heating capillary is located to be connected, and control the flow path where the air conditioner heat exchanger is located to be blocked, so that only the floor heating capillary is involved in the heat exchange work, so as to ensure the uniformity of the indoor temperature through radiation heat exchange, which is conducive to significantly improving the heating comfort of the heat pump system. At this time, if it is detected that the heat pump system meets the defrost entry condition, the embodiment of the present disclosure can control the heat pump system to continue to operate the heating mode, continue the target heat storage time, and control the inlet pipeline of the floor heating capillary to be connected, and control the outlet pipeline of the floor heating capillary to be blocked, so that part of the high-temperature refrigerant can be stored in the floor heating capillary, which is conducive to using this part of the stored high-temperature refrigerant to maintain the indoor temperature stable during the subsequent defrost operation. Then the embodiment of the present disclosure controls the heat pump system to operate the first defrost mode, and controls the flow path where the floor heating capillary is located to be blocked, and controls the flow path where the air conditioner heat exchanger is located to be connected, so that the air conditioner heat exchanger is used as an evaporation device during the defrost operation. This can prevent the temperature of the floor heating capillary tubes involved in heat exchange from dropping suddenly in the late stage of heating, which will affect the subsequent heating effect, and is conducive to reducing the fluctuation of indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users. In addition, during defrosting operation, the disclosed embodiment can use the waste heat of the refrigerant stored in the floor heating capillary tubes to offset the cold released by the air conditioner heat exchanger during defrosting, which is conducive to maintaining the indoor temperature stable and avoiding the user's unpleasant experience of alternating hot and cold.

[0062] Based on the above heat pump system, combined with Figure 4 As shown, the embodiment of the present disclosure provides another control method for a heat pump system, comprising:

[0063] S301, when the heat pump system operates in heating mode, the control device determines that the target heat exchange component is the air conditioning heat exchanger, and controls the flow path where the air conditioning heat exchanger is located to be connected, and controls the flow path where the floor heating capillary is located to be blocked.

[0064] S302, when the defrost entry conditions are met, the control device controls the flow path where the air-conditioning heat exchanger is located to be blocked, and controls the flow path where the floor heating capillary is located to be connected, so as to control the heat pump system to operate in the second defrost mode.

[0065] By adopting the control method for the heat pump system provided by the embodiment of the present disclosure, in the initial stage of the heating operation of the heat pump system, the embodiment of the present disclosure can determine the air-conditioning heat exchanger as the target heat exchange component, and control the flow path where the air-conditioning heat exchanger is located to be connected, and control the flow path where the floor heating capillary is located to be blocked, so that only the air-conditioning heat exchanger is involved in the heat exchange work, so as to quickly increase the indoor temperature through convective heat exchange, which is conducive to significantly improving the heating efficiency of the heat pump system. At this time, if it is detected that the heat pump system meets the defrost entry conditions, the embodiment of the present disclosure can control the heat pump system to run the second defrost mode, and control the flow path where the air-conditioning heat exchanger is located to be blocked, and control the flow path where the floor heating capillary is located to be connected, so that the floor heating capillary is used as an evaporation device during the defrost operation. Thereby, it is possible to avoid the sudden drop in temperature of the air-conditioning heat exchanger participating in the heat exchange work in the initial stage of heating to affect its subsequent heating effect, which is conducive to reducing the fluctuation of the indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users.

[0066] Based on the above heat pump system, combined with Figure 5 As shown, the embodiment of the present disclosure provides another control method for a heat pump system, comprising:

[0067] S401, when the heat pump system operates in heating mode, the control device determines the target heat exchange component from the air-conditioning heat exchanger and the floor heating capillary tube, and controls the flow path where the target heat exchange component is located to be connected, and controls the flow path where the non-target heat exchange component is located to be blocked.

[0068] S402, when the defrost entry conditions are met, the control device controls the flow path where the target heat exchange component is located to be blocked, controls the flow path where the non-target heat exchange component is located to be connected, and controls the heat pump system to operate in a defrost mode.

[0069] S403, when the defrost exit condition is met, the control device controls the flow path where the target heat exchange component is located to be connected, controls the flow path where the non-target heat exchange component is located to be blocked, and controls the heat pump system to resume operation in the heating mode.

[0070] By adopting the control method for a heat pump system provided by the embodiment of the present disclosure, when it is determined that the heat pump system meets the defrost entry conditions, the embodiment of the present disclosure can control the flow path where the target heat exchange component is located to be blocked, and control the flow path where the non-target heat exchange component is located to be connected, so that the non-target heat exchange component can be used as an evaporation device during defrosting operation, thereby avoiding the sudden drop in temperature of the target heat exchange component during defrosting to affect the subsequent heating effect, which is conducive to reducing the fluctuation of indoor temperature before and after defrosting, so as to better ensure the comfort experience of indoor users. When it is determined that the heat pump system meets the defrost exit conditions, the embodiment of the present disclosure controls the flow path where the target heat exchange component is located to be connected, and controls the flow path where the non-target heat exchange component is located to be blocked, thereby controlling the heat pump system to exit the defrost mode and resume the operation of the heating mode to ensure the comfort experience of indoor users.

[0071] Optionally, before the control device controls the flow path where the target heat exchange component is located to be connected, controls the flow path where the non-target heat exchange component is located to be blocked, and controls the heat pump system to resume operation in a heating mode, it also includes: the control device detects that the exhaust temperature of the compressor is greater than or equal to a preset exhaust temperature.

[0072] In this way, when the heat pump system exits the defrost mode, the embodiment of the present disclosure also detects the exhaust temperature of the compressor, and after confirming that the real-time exhaust temperature is greater than or equal to the preset exhaust temperature, the embodiment of the present disclosure controls the flow path where the target heat exchange component is located to be connected, and controls the flow path where the non-target heat exchange component is located to be blocked. This prevents the low-temperature refrigerant flowing out of the compressor from entering the target heat exchange component when the heating operation is just resumed, affecting the heating effect at this time, which is conducive to better ensuring the comfort experience of indoor users.

[0073] Optionally, the preset exhaust temperature can be set in combination with the defrost duration. Preferably, the preset exhaust temperature is 30° C. The preset exhaust temperature can also be adjusted according to actual user needs, and can also be set to any other reasonable value such as 40° C. or 50° C.

[0074] Optionally, the control device determines that the defrosting condition is met in the following manner: the control device detects that the coil temperature of the outdoor heat exchanger is greater than or equal to the second coil temperature, and the duration is greater than or equal to the preset duration. The second coil temperature is greater than the first coil temperature. In this way, when the coil temperature of the outdoor heat exchanger is greater than or equal to the second coil temperature, it indicates that the frost layer on the outdoor unit coil is basically melted, and it can be judged that the outdoor unit meets the defrosting exit condition. At this time, the heat pump system can be controlled to end the defrosting mode to resume indoor heating operation.

[0075] Preferably, the second coil temperature can be set to 10°C, and the preset time can be set to 2 minutes. Then the defrost exit condition is: the coil temperature of the outdoor heat exchanger is greater than or equal to 10°C, and the duration is greater than or equal to 2 minutes.

[0076] Combination Figure 6As shown, the embodiment of the present disclosure provides a control device 300 for a heat pump system, including a processor 301 and a memory 302. Optionally, the device 300 may also include a communication interface 303 and a bus 304. The processor 301, the communication interface 303, and the memory 302 may communicate with each other through the bus 304. The communication interface 303 may be used for information transmission. The processor 301 may call the logic instructions in the memory 302 to execute the control method for the heat pump system of the above embodiment.

[0077] In addition, the logic instructions in the memory 302 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0078] The memory 302 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 301 executes functional applications and data processing by running the program instructions / modules stored in the memory 302, that is, implementing the control method for the heat pump system in the above embodiment.

[0079] The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 302 may include a high-speed random access memory and may also include a non-volatile memory.

[0080] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for a heat pump system.

[0081] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0082] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0083] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0084] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0085] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A control method for a heat pump system, characterized in that: The heat pump system includes an outdoor unit and an indoor unit, wherein the indoor unit includes an air conditioning heat exchanger and a floor heating capillary arranged in parallel; the control method includes: When the heat pump system is running in heating mode, the target heat exchange component is determined from the air-conditioning heat exchanger and the floor heating capillary tube, and the flow path where the target heat exchange component is located is controlled to be connected, and the flow path where the non-target heat exchange component is located is controlled to be blocked; When the defrost entry conditions are met, the flow path where the target heat exchange component is located is controlled to be blocked, the flow path where the non-target heat exchange component is located is controlled to be connected, and the heat pump system is controlled to run in defrost mode.

2. The control method according to claim 1, characterized in that: Identify target heat exchange components from air conditioning heat exchangers and floor heating capillaries, including: Determine the target heat exchange component from the air conditioning heat exchanger and the floor heating capillary tube according to the current indoor temperature difference; and / or, The target heat exchange components are determined from the air conditioning heat exchanger and the floor heating capillary according to the current heating time.

3. The control method according to claim 2, characterized in that: According to the current indoor temperature difference, the target heat exchange components are determined from the air conditioning heat exchanger and floor heating capillary tube, including: When the current indoor temperature difference is greater than the preset indoor temperature difference, determining that the target heat exchange component is an air conditioning heat exchanger; or, When the current indoor temperature difference is less than or equal to the preset indoor temperature difference, the target heat exchange component is determined to be the floor heating capillary.

4. The control method according to claim 2, characterized in that: According to the current heating time, the target heat exchange components are determined from the air conditioning heat exchanger and floor heating capillary tube, including: When the current heating time is less than the preset heating time, the target heat exchange component is determined to be an air conditioner heat exchanger; or, When the current heating time is greater than or equal to the preset heating time, the target heat exchange component is determined to be the floor heating capillary tube.

5. The control method according to any one of claims 1 to 4, characterized in that: Control the isolation of the flow path where the target heat exchange component is located, control the conduction of the flow path where the non-target heat exchange component is located, and control the heat pump system to run the defrost mode, including: Control the flow path where the floor heating capillary tube is located to be blocked, and control the flow path where the air conditioning heat exchanger is located to be connected, so as to control the heat pump system to operate in the first defrosting mode; or, The flow path where the air-conditioning heat exchanger is located is controlled to be blocked, and the flow path where the floor heating capillary is located is controlled to be connected, so as to control the heat pump system to run the second defrost mode.

6. The control method according to claim 5, characterized in that: Before controlling the flow path where the floor heating capillary tube is located to be blocked and controlling the flow path where the air conditioning heat exchanger is located to be connected, so as to control the heat pump system to run the first defrost mode, the method further includes: Control the conduction of the inlet pipeline of the floor heating capillary tube, control the isolation of the outlet pipeline of the floor heating capillary tube, and control the heat pump system to continue to operate the heating mode for the target heat storage time.

7. The control method according to any one of claims 1 to 4, characterized in that: Also includes: When the defrost exit conditions are met, the flow path where the target heat exchange component is located is controlled to be connected, the flow path where the non-target heat exchange component is located is controlled to be blocked, and the heat pump system is controlled to resume operation in the heating mode.

8. A control device for a heat pump system, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the control method for a heat pump system according to any one of claims 1 to 7 when running the program instructions.

9. A heat pump system, characterized in that: include: Outdoor unit; An indoor unit, including an air conditioning heat exchanger and a floor heating capillary tube arranged in parallel; The control device for a heat pump system as claimed in claim 8 is electrically connected to the flow path where the air conditioning heat exchanger is located and the flow path where the floor heating capillary is located, respectively.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the control method for a heat pump system according to any one of claims 1 to 7.

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