Heating equipment and control method, device and medium of throttling device in heating equipment

Abstract

The present invention discloses a heating device and a control method, device and medium for a throttling device in the heating device. The control method includes: when the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode; in the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time; according to the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve, it is judged whether the first switching condition is met; if so, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode. The technical solution of the present invention expands the adjustment range of the refrigerant in the heating device, meets the requirements of the heating device for the refrigerant flow rate, improves the heat exchange capacity and operation reliability of the heating device, and at the same time reduces the requirements for the computing power of the heating device.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump control, and in particular to a heating device and a control method, device and medium for a throttling device in the heating device. Background Art

[0002] Heat pump is a device that transfers heat energy from a low-level heat source to a high-level heat source. It has attracted widespread attention from all over the world because it can greatly improve the utilization rate of energy. With the development of heat pump technology, people have higher and higher requirements on the environmental range in which heat pump products can be used.

[0003] In the prior art, the throttling device of heat pump products generally uses an electronic expansion valve, which has a limited refrigerant flow range, restricting the heat pump system's requirements for refrigerant flow, thereby limiting the heat exchange capacity and operational reliability of the heat pump system, making the heat pump product energy-efficient and prone to exhaust protection and other phenomena. Summary of the invention

[0004] The present invention provides a heating device and a control method, device and medium for a throttling device in the heating device to solve the defects in the prior art, expand the adjustment range of the refrigerant in the heating device, and improve the heat exchange capacity and operation reliability of the heating device.

[0005] In a first aspect, the present invention provides a control method for a throttling device in a heating device, wherein the heating device comprises an exhaust pipeline, a return pipeline and a throttling device, wherein an input port of the throttling device is connected to the exhaust pipeline, an output port of the throttling device is connected to the return pipeline, and the throttling device comprises a first electronic expansion valve and a second electronic expansion valve connected in parallel, wherein the control method comprises:

[0006] When the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode; wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is turned on and the second electronic expansion valve is turned off;

[0007] In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time;

[0008] According to the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve, it is judged whether a first switching condition is met; the first switching condition is: the current exhaust temperature is greater than a preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than a threshold opening;

[0009] If so, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode; wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened.

[0010] Optionally, the control method of the throttling device in the heating equipment further includes:

[0011] After the heating device is turned on, obtaining the target superheat and the actual superheat in real time;

[0012] Determining whether a difference between the actual superheat and the target superheat is within a preset difference range;

[0013] If not, then in the single electronic expansion valve control mode, the opening of the first electronic expansion valve is adjusted according to the actual superheat and the target superheat; or, in the dual electronic expansion valve control mode, the openings of the first electronic expansion valve and the second electronic expansion valve are adjusted according to the actual superheat and the target superheat.

[0014] Optionally, obtain the actual superheat, including:

[0015] obtaining a current exhaust pressure in the exhaust pipeline;

[0016] Determining, according to the current exhaust pressure, a condensation temperature corresponding to the current exhaust pressure;

[0017] The actual superheat is determined according to the current exhaust gas temperature and the condensing temperature.

[0018] Optionally, obtain the actual superheat, including:

[0019] Obtaining the current return air temperature and the current return air pressure in the return air pipeline;

[0020] According to the current return air pressure, determining an evaporation temperature corresponding to the current return air pressure;

[0021] The actual superheat is determined according to the current return air temperature and the evaporation temperature.

[0022] Optionally, the control method of the throttling device in the heating equipment further includes:

[0023] When the heating device is turned on, if the ambient temperature of the heating device is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode.

[0024] Optionally, the control method of the throttling device in the heating equipment further includes:

[0025] Before the heating device is turned on, the opening degree of the first electronic expansion valve and the opening degree of the second electronic expansion valve are both adjusted to standby opening degrees.

[0026] In a second aspect, the present invention provides a control device for a throttling device in a heating device, the heating device comprising an exhaust pipeline, a return pipeline and a throttling device, the input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return pipeline, the throttling device comprises a first electronic expansion valve and a second electronic expansion valve connected in parallel, and the control device comprises:

[0027] a control module, configured to control the throttling device to start a single electronic expansion valve control mode when the heating device is turned on, if the ambient temperature of the heating device is less than or equal to a preset ambient temperature; wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is turned on, and the second electronic expansion valve is turned off;

[0028] an acquisition module, used for acquiring, in the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve in real time;

[0029] a judgment module, configured to judge whether a first switching condition is satisfied according to the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve; the first switching condition is: the current exhaust temperature is greater than a preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than a threshold opening;

[0030] A mode switching module is used to switch the throttling device from the single electronic expansion valve control mode to the dual electronic expansion valve control mode; wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened.

[0031] In a third aspect, the present invention provides a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the control method of a throttling device in a heating device as described above when executed by a processor.

[0032] In a fourth aspect, the present invention provides a heating device, comprising: an exhaust pipeline, a return air pipeline, a throttling device and a controller;

[0033] The input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return air pipeline, and the throttling device includes a first electronic expansion valve and a second electronic expansion valve connected in parallel;

[0034] The controller is used to execute any of the above-mentioned control methods for a throttling device in a heating device.

[0035] Optionally, the heating equipment further includes a compressor, a condenser and an evaporator;

[0036] The exhaust port of the compressor is connected to the exhaust pipeline, and the air intake port of the compressor is connected to the air return pipeline;

[0037] The condenser is connected to the exhaust pipeline, and the evaporator is connected to the return air pipeline.

[0038] The technical solution of the present invention is that when the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time. By judging whether the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve meet the first switching condition, wherein the first switching condition is that the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening, when the first switching condition is met, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode, thereby expanding the adjustment range of the refrigerant in the heating device, meeting the requirements of the heating device for the refrigerant flow rate, and improving the heat exchange capacity and operation reliability of the heating device. At the same time, by switching the throttling device from the single electronic expansion valve control mode to the dual electronic expansion valve control mode when the first switching condition is met, the requirements for the computing power of the heating device are reduced, and the cost is saved.

[0039] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A flow chart of a method for controlling a throttling device in a heating device provided in Embodiment 1 of the present invention;

[0042] Figure 2A flow chart of a method for controlling a throttling device in a heating device provided in Embodiment 2 of the present invention;

[0043] Figure 3 A flow chart of a method for controlling a throttling device in a heating device provided in Embodiment 3 of the present invention;

[0044] Figure 4 A schematic diagram of the structure of a control device for a throttling device in a heating device provided in a fourth embodiment of the present invention;

[0045] Figure 5 This is a structural block diagram of a heating device provided in Embodiment 5 of the present invention. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] Embodiment 1

[0049] An embodiment of the present invention provides a control method for a throttling device in a heating device, the heating device comprising an exhaust pipeline, a return air pipeline and a throttling device, the input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return air pipeline, the throttling device comprises a first electronic expansion valve and a second electronic expansion valve connected in parallel, the control method can be applied to control the switching of the control mode of the throttling device and control the valve opening of the throttling device, the control method of the throttling device in the heating device can be executed by the control device of the throttling device in the heating device provided by the embodiment of the present invention, the control device of the throttling device in the heating device is implemented in the form of hardware and / or software, and the control device of the throttling device in the heating device can be integrated in the controller of the heating device. Figure 1 This is a flow chart of a method for controlling a throttling device in a heating device provided in Embodiment 1 of the present invention. Figure 1 As shown, the control method of the throttling device in the heating equipment includes:

[0050] S110: When the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode.

[0051] Wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is opened and the second electronic expansion valve is closed.

[0052] Among them, the heating equipment can be but is not limited to a heat pump. The heating equipment can obtain the ambient temperature in real time by setting a temperature sensor, etc. The preset ambient temperature can be a pre-set temperature constant, and the preset ambient temperature is within the ambient temperature range in which the heating equipment can be used normally. When the ambient temperature is less than or equal to the preset ambient temperature, the throttling device starts the single electronic expansion valve control mode. For example, if the ambient temperature range in which the heating equipment can be used normally is -25℃~45℃, the preset ambient temperature is a constant between [-25℃, 45℃].

[0053] The electronic expansion valve is a throttling element that uses the electrical signal generated by the regulated parameter to control the voltage or current applied to the expansion valve, thereby achieving the purpose of regulating the liquid supply. It has the advantages of a wide regulation range and a fast regulation response. The first electronic expansion valve and the second electronic expansion valve are connected in parallel between the exhaust pipe and the return pipe of the heating equipment. The specifications of the first electronic expansion valve and the second electronic expansion valve can be the same or different, and this embodiment does not make any requirements for this.

[0054] Specifically, when the heating equipment is turned on, the heating equipment obtains the ambient temperature in real time. When the ambient temperature of the heating equipment is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. At this time, the first electronic expansion valve is opened and its opening degree is adjusted to make the heating equipment run normally and smoothly, and the second electronic expansion valve is closed, thereby saving energy.

[0055] S120. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline, and the current opening of the first electronic expansion valve are obtained in real time.

[0056] Among them, the heating equipment may include a compressor, the current exhaust temperature of the exhaust pipeline may be the exhaust temperature of the compressor, and the exhaust temperature may be obtained by a temperature sensor, etc.; in the single electronic expansion valve control mode, the first electronic expansion valve is opened and its opening is adjusted, and the current opening of the first electronic expansion valve may be the opening of the first electronic expansion valve obtained for the last time.

[0057] S130. Determine whether a first switching condition is met based on the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve; if so, execute S140.

[0058] The first switching condition is that the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening.

[0059] Among them, the preset exhaust temperature can be a preset exhaust temperature value, which can be set as the target exhaust temperature when the heating equipment is operating normally; the preset ambient temperature can be a preset temperature constant, and the preset ambient temperature is within the ambient temperature range in which the heating equipment can be used normally. When the ambient temperature is less than or equal to the preset ambient temperature, the throttling device starts the single electronic expansion valve control mode; the threshold opening of the first electronic expansion valve can be the maximum allowable opening of the first electronic expansion valve.

[0060] Specifically, when the heating equipment is in the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipe and the current opening of the first electronic expansion valve are obtained in real time to determine whether the first switching condition is met, that is, to determine whether the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening. If the first switching condition is met, it indicates that under the current operating state, the first electronic expansion valve control mode cannot meet the requirements for normal and smooth operation of the heating equipment.

[0061] S140, switching the throttling device from a single electronic expansion valve control mode to a dual electronic expansion valve control mode.

[0062] Wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened.

[0063] In an exemplary embodiment, under the single electronic expansion valve control mode, if the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve meet the first switching condition, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode. When switching to the dual electronic expansion valve control mode, the opening of the first electronic expansion valve and the opening of the second electronic expansion valve are redetermined.

[0064] Specifically, when the heating device is turned on, the heating device obtains the ambient temperature in real time. When the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. At this time, the first electronic expansion valve is turned on and its opening is adjusted, and the second electronic expansion valve is closed. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time to determine whether the first switching condition is met, that is, whether the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening. If the first switching condition is met, it indicates that under the current operating state, the first electronic expansion valve control mode cannot meet the requirements of the normal and stable operation of the heating device. Therefore, the throttling device can be switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode. At this time, the first electronic expansion valve and the second electronic expansion valve are both turned on and their openings are adjusted to meet the requirements of the heating device for the refrigerant flow rate, so that the heating device can operate normally and smoothly.

[0065] In this embodiment, when the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time. By judging whether the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve meet the first switching condition, wherein the first switching condition is that the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening, when the first switching condition is met, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode, thereby expanding the adjustment range of the refrigerant in the heating device, meeting the requirements of the heating device for the refrigerant flow rate, and improving the heat exchange capacity and operation reliability of the heating device. At the same time, by switching the throttling device from the single electronic expansion valve control mode to the dual electronic expansion valve control mode when the first switching condition is met, the requirements for the computing power of the heating device are reduced, saving costs.

[0066] Embodiment 2

[0067] Figure 2 This is a flow chart of a method for controlling a throttling device in a heating device provided in the second embodiment of the present invention. Based on the above embodiment, this embodiment further adds a step of how to adjust the opening of the first electronic expansion valve and the second electronic expansion valve. Figure 2 As shown, the control method provided in this embodiment specifically includes:

[0068] S210: When the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode.

[0069] Specifically, when the heating equipment is turned on, the ambient temperature of the heating equipment is obtained in real time. When the ambient temperature of the heating equipment is less than or equal to the ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. At this time, the first electronic expansion valve is opened and its opening degree is adjusted to make the heating equipment run normally and smoothly, and the second electronic expansion valve is closed, thereby saving energy.

[0070] S220. Obtain the target superheat and the actual superheat in real time.

[0071] Among them, the target superheat can be a pre-set superheat that allows the heating equipment to operate normally and smoothly; the actual superheat can be the superheat actually obtained during the operation of the heating equipment. In an exemplary embodiment, the actual superheat can be determined by the exhaust temperature and the condensing temperature. In another exemplary embodiment, the actual superheat can also be determined by the return air temperature and the evaporation temperature.

[0072] In an optional embodiment, when the actual superheat is determined by the exhaust temperature and the condensing temperature, obtaining the actual superheat may include: obtaining the current exhaust pressure in the exhaust pipeline, determining the condensing temperature corresponding to the current exhaust pressure based on the current exhaust pressure, and determining the actual superheat based on the current exhaust temperature and the condensing temperature.

[0073] The heating device may include a condenser, which is connected to the exhaust pipeline. The current exhaust pressure in the exhaust pipeline may be the pressure at any position in the exhaust pipeline. For example, the current exhaust pressure in the exhaust pipeline may be the pressure in the condenser. In this embodiment, the mapping relationship between the exhaust pressure and the condensing temperature may be determined by experiment. The mapping relationship may be a comparison table or a relationship between the exhaust pressure and the condensing temperature. After obtaining the current exhaust pressure, the condensing temperature corresponding to the current exhaust pressure may be determined by looking up the table or by inserting it into the formula. In an exemplary embodiment, the actual superheat may be the difference between the current exhaust temperature and the condensing temperature.

[0074] In another optional embodiment, when the actual superheat is determined by the return air temperature and the evaporating temperature, obtaining the actual superheat may include: obtaining the current return air temperature and the current return air pressure in the return air pipeline; determining the evaporating temperature corresponding to the current return air pressure based on the current return air pressure; and determining the actual superheat based on the current return air temperature and the evaporating temperature.

[0075] The current return air temperature may be the current temperature of the compressor suction port, the heating device may include an evaporator, the evaporator is connected to the return air pipeline, the current return air pressure in the return air pipeline may be the pressure at any position in the return air pipeline, and illustratively, the current return air pressure in the return air pipeline may be the pressure in the evaporator. In this embodiment, the mapping relationship between the return air pressure and the evaporation temperature is determined by experiment, and the mapping relationship may be a comparison table or a relationship between the return air pressure and the evaporation temperature. After obtaining the current return air pressure, the evaporation temperature corresponding to the current return air pressure can be determined by looking up the table or by inserting it into the formula. In an exemplary embodiment, the actual superheat may be the difference between the current return air temperature and the evaporation temperature.

[0076] S230: Determine whether the difference between the actual superheat and the target superheat is within a preset difference range; if not, execute S240.

[0077] Among them, the preset difference range can be a pre-set maximum difference between the actual superheat and the target superheat that can enable the heating equipment to operate normally and smoothly, which can be determined according to the performance and requirements of the heating equipment; it can be understood that the smaller the difference between the actual superheat and the target superheat, the smoother the operation of the heating equipment.

[0078] S240. In the single electronic expansion valve control mode, adjusting the opening of the first electronic expansion valve according to the actual superheat and the target superheat.

[0079] In an exemplary embodiment, if the heating equipment is in a single electronic expansion valve control mode, when the difference between the actual superheat and the target superheat is not within the preset difference range, and the actual superheat is greater than the target superheat, the opening of the first electronic expansion valve is controlled to be increased. Correspondingly, when the difference between the actual superheat and the target superheat is not within the preset difference range, and the actual superheat is less than the target superheat, the opening of the first electronic expansion valve is controlled to be decreased so that the heating equipment can operate normally and smoothly.

[0080] S250. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline, and the current opening of the first electronic expansion valve are obtained in real time.

[0081] S260. Determine whether a first switching condition is met based on the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve; if so, execute S270.

[0082] S270, switching the throttling device from a single electronic expansion valve control mode to a dual electronic expansion valve control mode.

[0083] Specifically, when the heating device is turned on, the heating device obtains the ambient temperature in real time. When the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode, the first electronic expansion valve is turned on, and the second electronic expansion valve is turned off. At this time, if the difference between the target superheat degree obtained in real time and the actual superheat degree is not within the preset difference range, the opening of the first electronic expansion valve is adjusted according to the actual superheat degree and the target superheat degree. In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time to determine whether the first switching condition is met, that is, whether the current exhaust temperature is greater than the preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening. If the first switching condition is met, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode. At this time, the first electronic expansion valve and the second electronic expansion valve are both turned on and their openings are adjusted to meet the requirements of the heating device for the refrigerant flow rate, so that the heating device can operate normally and smoothly.

[0084] In this embodiment, when the heating equipment is turned on, the heating equipment obtains the ambient temperature in real time. When the ambient temperature of the heating equipment is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode. At this time, by obtaining the target superheat and the actual superheat in real time, when the difference between the target superheat and the actual superheat obtained in real time is not within the preset difference range, the opening of the first electronic expansion valve is adjusted according to the actual superheat and the target superheat. When the refrigerant flow rate can meet the demand under the single electronic expansion valve control mode, the single electronic expansion valve control mode is turned on to save energy.

[0085] Embodiment 3

[0086] Figure 3 This is a flow chart of a method for controlling a throttling device in a heating device according to the third embodiment of the present invention. Based on the above embodiment, this embodiment further adds a step of controlling the throttling device to start the dual electronic expansion valve control mode when the heating device is turned on. Figure 3 As shown, the control method provided in this embodiment specifically includes:

[0087] S310: When the heating device is turned on, if the ambient temperature of the heating device is greater than a preset ambient temperature, the throttling device is controlled to start a dual electronic expansion valve control mode.

[0088] Specifically, when the ambient temperature of the heating equipment is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode. At this time, the first electronic expansion valve and the second electronic expansion valve are both opened and their opening degrees are adjusted to meet the heating equipment's requirements for refrigerant flow, so that the heating equipment can operate normally and smoothly.

[0089] S320. Obtain the target superheat and the actual superheat in real time.

[0090] S330: Determine whether the difference between the actual superheat and the target superheat is within a preset difference range; if not, execute S340.

[0091] S340: In the dual electronic expansion valve control mode, adjusting the openings of the first electronic expansion valve and the second electronic expansion valve according to the actual superheat and the target superheat.

[0092] In an exemplary embodiment, if the heating equipment is in a dual electronic expansion valve control mode, when the difference between the actual superheat and the target superheat is not within the preset difference range, and the actual superheat is greater than the target superheat, the openings of the first electronic expansion valve and the second electronic expansion valve are controlled to be increased. Correspondingly, when the difference between the actual superheat and the target superheat is not within the preset difference range, and the actual superheat is less than the target superheat, the openings of the first electronic expansion valve and the second electronic expansion valve are controlled to be decreased so that the heating equipment can operate normally and smoothly.

[0093] Specifically, when the heating equipment is turned on, the heating equipment obtains the ambient temperature in real time. When the ambient temperature of the heating equipment is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode, and the first electronic expansion valve and the second electronic expansion valve are both turned on. At this time, if the difference between the target superheat obtained in real time and the actual superheat is not within the preset difference range, the opening of the first electronic expansion valve and the second electronic expansion valve are adjusted according to the actual superheat and the target superheat.

[0094] In this embodiment, when the heating equipment is turned on, the heating equipment obtains the ambient temperature in real time. When the ambient temperature of the heating equipment is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode. At this time, by obtaining the target superheat and the actual superheat in real time, when the difference between the target superheat and the actual superheat obtained in real time is not within the preset difference range, the opening of the first electronic expansion valve and the second electronic expansion valve can be adjusted according to the actual superheat and the target superheat. When the ambient temperature is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode, thereby meeting the requirements of the heating equipment for the refrigerant flow rate and allowing the heating equipment to operate normally and smoothly.

[0095] Embodiment 4

[0096] The present embodiment provides a control device for a throttling device in a heating device. The heating device includes an exhaust pipeline, a return air pipeline and a throttling device. The input port of the throttling device is connected to the exhaust pipeline, and the output port of the throttling device is connected to the return air pipeline. The throttling device includes a first electronic expansion valve and a second electronic expansion valve connected in parallel. The control device can be implemented in the form of hardware and / or software and can be integrated in the controller of the heating device. Figure 4 The schematic diagram of the structure of the control device of the throttling device in the heating device provided in the third embodiment of the present invention is as follows: Figure 4 As shown, the control device includes:

[0097] The control module 410 is used to control the throttling device to start the single electronic expansion valve control mode when the heating device is turned on and the ambient temperature of the heating device is less than or equal to the preset ambient temperature; wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is turned on and the second electronic expansion valve is closed.

[0098] The acquisition module 420 is used to acquire the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening degree of the first electronic expansion valve in real time under the single electronic expansion valve control mode.

[0099] The judgment module 430 is used to judge whether the first switching condition is met based on the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve; the first switching condition is: the current exhaust temperature is greater than the preset exhaust temperature, and the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than the threshold opening.

[0100] The mode switching module 440 is used to switch the throttling device from a single electronic expansion valve control mode to a dual electronic expansion valve control mode; wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened.

[0101] The control device of the throttling device in the heating equipment provided in the embodiment of the present invention can execute the control method of the throttling device in the heating equipment provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. The similarities can be referred to the above description.

[0102] Embodiment 5

[0103] Figure 5 A structural block diagram of a heating device provided in Embodiment 5 of the present invention is shown in FIG. Figure 5 As shown, the heating equipment includes an exhaust pipe 1, a return air pipe 2, a throttling device 3 and a controller (not shown in the figure); the input port of the throttling device 3 is connected to the exhaust pipe 1, the output port of the throttling device 3 is connected to the return air pipe 2, and the throttling device 3 includes a first electronic expansion valve 31 and a second electronic expansion valve 32 connected in parallel; the controller is used to execute the control method of the throttling device in the heating equipment provided in any of the above embodiments.

[0104] Optionally, the heating equipment provided in this embodiment also includes a compressor 4, a condenser 5 and an evaporator 6; the exhaust port of the compressor 4 is connected to the exhaust pipeline 1, and the intake port of the compressor 4 is connected to the return air pipeline 2; the condenser 5 is connected to the exhaust pipeline 2, and the evaporator 6 is connected to the return air pipeline.

[0105] The heating device has the corresponding structure and characteristics of executing the control method of the throttling device in the heating device provided in any embodiment of the present invention, and can achieve the beneficial effects of the control method of the cooking device provided in the embodiment of the present invention. The similarities can be referred to the above description.

[0106] Embodiment 6

[0107] Based on the same concept, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a processor to implement the management method provided by any of the above embodiments when executed.

[0108] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0109] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling a throttling device in a heating device, characterized in that: The heating device comprises an exhaust pipeline, a return pipeline and a throttling device, the input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return pipeline, the throttling device comprises a first electronic expansion valve and a second electronic expansion valve connected in parallel, and the control method comprises: When the heating device is turned on, if the ambient temperature of the heating device is less than or equal to the preset ambient temperature, the throttling device is controlled to start the single electronic expansion valve control mode; wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is turned on and the second electronic expansion valve is turned off; In the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve are obtained in real time; According to the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve, it is judged whether a first switching condition is met; the first switching condition is: the current exhaust temperature is greater than a preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than a threshold opening; If yes, the throttling device is switched from the single electronic expansion valve control mode to the dual electronic expansion valve control mode; wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened; Also includes: After the heating device is turned on, obtaining the target superheat and the actual superheat in real time; Determining whether a difference between the actual superheat and the target superheat is within a preset difference range; If not, then in the single electronic expansion valve control mode, the opening of the first electronic expansion valve is adjusted according to the actual superheat and the target superheat; or, in the dual electronic expansion valve control mode, the openings of the first electronic expansion valve and the second electronic expansion valve are adjusted according to the actual superheat and the target superheat; Wherein, obtaining the actual superheat degree includes: obtaining a current exhaust pressure in the exhaust pipeline; Determining, according to the current exhaust pressure, a condensation temperature corresponding to the current exhaust pressure; determining the actual superheat according to the current exhaust gas temperature and the condensing temperature; or; The obtaining of the actual superheat degree comprises: Obtaining the current return air temperature and the current return air pressure in the return air pipeline; According to the current return air pressure, determining an evaporation temperature corresponding to the current return air pressure; The actual superheat is determined according to the current return air temperature and the evaporation temperature.

2. The control method of the throttling device in the heating equipment according to claim 1, characterized in that: Also includes: When the heating device is turned on, if the ambient temperature of the heating device is greater than the preset ambient temperature, the throttling device is controlled to start the dual electronic expansion valve control mode.

3. The control method of the throttling device in the heating equipment according to claim 1, characterized in that: Also includes: Before the heating device is turned on, the opening degree of the first electronic expansion valve and the opening degree of the second electronic expansion valve are both adjusted to standby opening degrees.

4. A control device for a throttling device in a heating device, which is controlled by the control method for a throttling device in a heating device according to any one of claims 1 to 3, characterized in that: The heating device comprises an exhaust pipeline, a return pipeline and a throttling device, the input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return pipeline, the throttling device comprises a first electronic expansion valve and a second electronic expansion valve connected in parallel, and the control device comprises: a control module, configured to control the throttling device to start a single electronic expansion valve control mode when the heating device is turned on, if the ambient temperature of the heating device is less than or equal to a preset ambient temperature; wherein, in the single electronic expansion valve control mode, the first electronic expansion valve is turned on, and the second electronic expansion valve is turned off; an acquisition module, used for acquiring, in the single electronic expansion valve control mode, the current ambient temperature, the current exhaust temperature of the exhaust pipeline and the current opening of the first electronic expansion valve in real time; a judgment module, configured to judge whether a first switching condition is satisfied according to the current exhaust temperature, the current ambient temperature and the current opening of the first electronic expansion valve; the first switching condition is: the current exhaust temperature is greater than a preset exhaust temperature, the current ambient temperature is greater than the preset ambient temperature, and the current opening of the first electronic expansion valve is greater than a threshold opening; A mode switching module is used to switch the throttling device from the single electronic expansion valve control mode to the dual electronic expansion valve control mode; wherein, in the dual electronic expansion valve control mode, both the first electronic expansion valve and the second electronic expansion valve are opened.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the control method of a throttling device in a heating device according to any one of claims 1 to 3 when executed.

6. A heating device, characterized in that: include: Exhaust pipeline, return air pipeline, throttling device and controller; The input port of the throttling device is connected to the exhaust pipeline, the output port of the throttling device is connected to the return air pipeline, and the throttling device includes a first electronic expansion valve and a second electronic expansion valve connected in parallel; The controller is used to execute the control method of the throttling device in the heating equipment according to any one of claims 1-3.

7. The heating device according to claim 6, characterized in that: It also includes the compressor, condenser and evaporator; The exhaust port of the compressor is connected to the exhaust pipeline, and the air intake port of the compressor is connected to the air return pipeline; The condenser is connected to the exhaust pipeline, and the evaporator is connected to the return air pipeline.

Images