WO2019242493A1

WO2019242493A1 - Heat pump system and control method therefor

Info

Publication number: WO2019242493A1
Application number: PCT/CN2019/089850
Authority: WO
Inventors: 罗彬�; 李元阳; 刘树清; 杨坤; 占磊
Original assignee: 合肥美的暖通设备有限公司; 广东美的暖通设备有限公司
Priority date: 2018-06-20
Filing date: 2019-06-03
Publication date: 2019-12-26
Also published as: PL3623726T3; EP3623726B1; EP3623726A4; EP3623726A1

Abstract

A heat pump system (1) and a control method therefor, the heat pump system (1) comprising an outdoor heat exchanger (10) and electromagnetic heating assembly (20). The electromagnetic heating assembly (20) comprises an induction heating plate (200), an insulation board (210) and an electromagnetic induction wire coil (220), wherein the induction heating plate (200) is in contact with the outdoor heat exchanger (10), the electromagnetic induction wire coil (220) is attached to the insulation board (210), the insulation board (210) is connected to the outdoor heat exchanger (10) or the induction heating plate (200), and the induction heating plate (200) is in communication connection with the electromagnetic induction wire coil (220).

Description

Heat pump system and control method thereof

Cross-reference to related applications

This application is based on a Chinese patent application with an application number of 201810638493.X, an application date of June 20, 2018, and a Chinese patent application with an application number of 201820955994.6, and an application date of June 20, 2018, and requests the above-mentioned Chinese patent application The priority of the above-mentioned Chinese patent application is incorporated herein by reference.

Technical field

The present application relates to the field of household appliances, and in particular, to a heat pump system and a control method thereof.

Background technique

In the heat pump system, in the heating mode, the refrigerant absorbs heat from the outdoor air through the outdoor heat exchanger, and then increases the pressure and temperature through the compressor to discharge the heat from the outdoor side to the room to achieve the heating effect. However, in the winter heating mode, the lower the outdoor temperature, the less heat can be transferred from the outdoor to the indoor, the worse the indoor heating effect, and the refrigerant in the outdoor heat exchanger needs to absorb outdoor air. The heat needs to be lower than the outdoor air temperature, which will cause the outdoor heat exchanger to frost in the heating mode.

In the related technology, in order to ensure that the system can continuously and heat supply safely and efficiently, the outdoor heat exchanger needs to be defrosted at regular intervals. At this time, heat is absorbed from the indoor side to be used for defrosting the outdoor unit heat exchanger. . This defrosting method will cause the indoor temperature to decrease by about 10 minutes, and when the outdoor unit resumes the heating mode, it will take a period of time to switch and start the compressor to gradually heat the refrigerant system to provide heating operation services. In addition, when the unit starts heating at low temperature, because the oil has a high solubility in the refrigerant at low temperature, the compressor needs to perform a long-term preheating mode to increase the temperature of the refrigerant discharged by the compressor to ensure that the refrigerant does not evaporate. A lot of refrigeration oil will not affect the normal operation of the compressor.

When the outdoor temperature is low to a certain degree, the amount of heat that can be absorbed from the outdoor will be very small, so that the indoor heating capacity is not as good as directly supplying the power supplied to the compressor to the energy obtained by the electric heater. However, usually indoor units, especially multi-line indoor units, are not equipped with electric heating, and even if the electric heating of the indoor unit is turned on, it is safe to use electric heating indoors because the configuration of the indoor side wires cannot support and use for a long time. Hidden danger.

Summary of the Invention

This application is intended to solve at least one of the technical problems existing in the related art. For this reason, an object of the present application is to propose a heat pump system having defrosting performance and excellent use performance.

The present application also proposes a control method of a heat pump system. The control method of the heat pump system has the advantages of simple control method and good control effect.

A heat pump system according to an embodiment of the present application includes: an outdoor heat exchanger; an electromagnetic heating component, the electromagnetic heating component includes an induction heating plate, a heat insulation plate, and an electromagnetic induction wire coil; the induction heating plate and the outdoor heat exchanger In contact, the electromagnetic induction wire plate is attached to the heat insulation plate, the heat insulation plate is connected to the outdoor heat exchanger or the induction heating plate, and the induction heating plate is communicatively connected to the electromagnetic induction wire plate.

According to the heat pump system of the embodiment of the present application, by installing an electromagnetic heating component on the outdoor heat exchanger, the electromagnetic heating component can heat and heat the outdoor heat exchanger, thereby improving the defrosting efficiency and heating efficiency of the outdoor heat exchanger, and improving the heat pump. The starting capacity of the freezer of the system can avoid the situation that the reliability of the compressor is not reduced due to the exhaust temperature, which can further improve the performance of the heat pump system. In addition, the electromagnetic heating component uses the magnetic field principle to release heat, which not only has high safety performance, but also has the advantages of simple structure, high heating accuracy, and easy control. In addition, the heat insulation plate can isolate the electromagnetic induction wire coil and the induction heating plate to avoid the induction heating plate from affecting the working performance of the electromagnetic induction electric coil.

According to some embodiments of the present application, the outdoor heat exchanger is a heat exchange tube, the induction heating sheet is located in the heat exchange tube, and the heat insulation plate is attached to an outer peripheral wall of the heat exchange tube.

In some embodiments of the present application, two opposite outer surfaces of the heat exchange tube are a first surface and a second surface, the heat insulation plate is two, and the first heat insulation plate and the second heat insulation plate are respectively The first heat-insulating plate is attached to the first surface, and the second heat-insulating plate is attached to the second surface; there are two electromagnetic induction wire reels, and the first electromagnetic induction wire reels are respectively And a second electromagnetic induction wire plate, the first electromagnetic induction wire plate is attached to the first heat insulation plate, and the second electromagnetic induction wire plate is attached to the second heat insulation plate.

According to some embodiments of the present application, the outdoor heat exchanger is a micro-channel plate.

In some embodiments of the present application, the induction heating sheet is attached to an outer peripheral wall of the outdoor heat exchanger.

In some embodiments of the present application, the electromagnetic heating component includes two pieces of the induction heating piece, and the two pieces of the induction heating piece are located on opposite outer surfaces of the microchannel plate, and the heat insulation plate and one piece The induction heating sheet is bonded.

In some embodiments of the present application, there are two microchannel plates, and the induction heating sheet is sandwiched between the two microchannel plates.

According to some embodiments of the present application, there are two sets of electromagnetic heating components, and the induction heating sheet, the heat insulation plate, and the electromagnetic induction wire coil of each group of the electromagnetic heating components are sequentially stacked, and the induction heating The sheet is attached to the outer surface of the outdoor heat exchanger.

In some embodiments of the present application, two sets of the electromagnetic heating components are respectively disposed on opposite surfaces of the outdoor heat exchanger.

According to some embodiments of the present application, the electromagnetic induction wire reel is circular, oval, or polygonal.

According to the method for controlling a heat pump system according to an embodiment of the present application, the heat pump system is a heat pump system as described above, the heat pump system includes a temperature sensor for detecting a compressor exhaust temperature, and the exhaust gas detected by the temperature sensor The temperature is T, and the target exhaust temperature of the heat pump system is set to T _{0. The} control method includes: the heat pump system is in a heating start mode or a defrost mode, and the electromagnetic heating component is started.

According to the control method of the heat pump system in the embodiment of the present application, when the heat pump system is in a heating start mode or a defrost mode, the outdoor heat exchanger can be heated and heated by the electromagnetic heating component, thereby improving the defrost efficiency of the outdoor heat exchanger and Heating efficiency, improving the starting capacity of the freezer of the heat pump system, avoiding the situation that the reliability of the compressor is not reduced due to the exhaust temperature, and thus the performance of the heat pump system can be improved. In addition, the electromagnetic heating component uses the magnetic field principle to release heat, which not only has high safety performance, but also has the advantages of simple structure, high heating accuracy, and easy control. In addition, the heat insulation plate can isolate the electromagnetic induction wire coil and the induction heating plate to avoid the induction heating plate from affecting the working performance of the electromagnetic induction electric coil.

According to some embodiments of the present application, in the normal heating mode, if T <T ₀ and the compressor reaches the maximum frequency, the electromagnetic heating component is started; if T ≧ T ₀ and the compressor does not reach the maximum frequency, all the The electromagnetic heating module stops heating.

Additional aspects and advantages of the present application will be given in part in the following description, part of which will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic structural view of a heat pump system according to an embodiment of the present application;

2 is a schematic structural view of a heat pump system according to an embodiment of the present application;

3 is a schematic structural view of a heat pump system according to an embodiment of the present application;

4 is a schematic structural view of a heat pump system according to an embodiment of the present application;

5 is a schematic structural view of a heat pump system according to an embodiment of the present application;

6 is a schematic structural view of a heat pump system according to an embodiment of the present application;

7 is a schematic structural view of a heat pump system according to an embodiment of the present application;

8 is a schematic structural view of a heat pump system according to an embodiment of the present application;

9 is a schematic structural view of a heat pump system according to an embodiment of the present application;

10 is a schematic structural view of a heat pump system according to an embodiment of the present application;

11 is a schematic structural view of a heat pump system according to an embodiment of the present application;

FIG. 12 is a control logic diagram of a heat pump system according to an embodiment of the present application.

Reference signs:

Heat pump system 1,

Outdoor heat exchanger 10, heat exchange tube 100, first surface 101, second surface 102, microchannel plate 110,

The electromagnetic heating module 20, the induction heating sheet 200, the thermal insulation plate 210, the first thermal insulation plate 211, the second thermal insulation plate 212, the electromagnetic induction wire tray 220, the first electromagnetic induction wire tray 221, and the second electromagnetic induction wire tray 222.

detailed description

Hereinafter, embodiments of the present application are described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

As shown in FIG. 1 to FIG. 11, the heat pump system 1 according to the embodiment of the present application includes an outdoor heat exchanger 10 and an electromagnetic heating assembly 20.

For example, as shown in FIG. 1 to FIG. 11, the electromagnetic heating module 20 includes an induction heating sheet 200, a heat insulation plate 210, and an electromagnetic induction wire tray 220. The induction heating sheet 200 is in contact with the outdoor heat exchanger 10, and the electromagnetic induction wire tray 220 is insulated from the heat. The plate 210 is attached, the heat insulation plate 210 is connected to the outdoor heat exchanger 10 or the induction heating plate 200, and the induction heating plate 200 is communicatively connected to the electromagnetic induction wire plate 220. For example, the heat insulation plate 210 may be provided on the outdoor heat exchanger 10, the heat insulation plate 210 may also be provided on the induction heating sheet 200, and the electromagnetic induction wire coil 220 may be attached to the heat insulation plate 210 away from the outdoor heat exchanger 10 or induction heating. On one side of the sheet 200, the induction heating sheet 200 is connected in contact with the outdoor heat exchanger 10. The induction heating sheet 200 is communicatively connected to the electromagnetic induction wire reel 220. The electromagnetic induction wire reel 220 can generate an alternating magnetic field to communicate with the induction heating sheet 200. Generate eddy currents and generate thermal energy. It should be noted that the “connection” mentioned herein is understood in a broad sense. The “connection” may be a direct connection or an indirect connection. The connection may be achieved by a snap connection, a screw connection, or an adhesive. In addition, the induction heating sheet 200 may be an iron induction heating sheet 200 containing an iron element, so as to form an eddy current with an alternating magnetic field generated by the electromagnetic induction wire coil 220.

In related technologies, in cold regions, the heat pump system generates heat at low temperatures, the freezer of the heat pump system has a slow start-up capability, and the exhaust temperature is insufficient to easily carry the refrigerated oil to the oil separator, which affects the reliability of the compressor. And the defrosting speed is slow and the heating effect is poor.

According to the heat pump system 1 of the embodiment of the present application, by providing an electromagnetic heating component 20 on the outdoor heat exchanger 10, the electromagnetic heating component 20 can heat and heat the outdoor heat exchanger 10, thereby improving the defrosting efficiency of the outdoor heat exchanger 10. And heating efficiency, improving the starting capacity of the freezer of the heat pump system 1, avoiding the situation that the reliability of the compressor is not reduced due to the exhaust temperature, and further improving the performance of the heat pump system 1. In addition, the electromagnetic heating component 20 uses the principle of magnetic field to release heat, which not only has high safety performance, but also has the advantages of simple structure, high heating accuracy, rapid heating and easy control. In addition, the heat insulation plate 210 can isolate the electromagnetic induction wire coil 220 and the induction heating sheet 200 to prevent the induction heating sheet 200 from affecting the working performance of the electromagnetic induction electric coil.

As shown in FIGS. 1-4, according to some embodiments of the present application, the outdoor heat exchanger 10 may be a heat exchange tube 100, an induction heating sheet 200 is located inside the heat exchange tube 100, and a heat insulation plate 210 is attached to the heat exchange tube 100. Peripheral wall. The electromagnetic induction wire coil 220 may be attached to a side of the heat insulation plate 210 away from the heat exchange tube 100. Therefore, the induction heating sheet 200 can directly perform heat exchange with the refrigerant in the heat exchange tube 100, and the induction heating sheet 200 can heat the refrigerant in the heat exchange tube 100, thereby improving the heating efficiency of the outdoor heat exchanger 10, and The refrigerant can further perform heat exchange with the heat exchange tube 100, so that the temperature of the heat exchange tube 100 can be increased to achieve a defrost effect.

According to some embodiments of the present application, the heat insulation plate 210 may be an insulator. The outdoor heat exchanger 10 may be made of metal or non-metal.

As shown in FIGS. 3 and 4, in some embodiments of the present application, two opposite outer surfaces of the heat exchange tube 100 are a first surface 101 and a second surface 102, and two heat insulation plates 210 are respectively The first heat insulation plate 211 and the second heat insulation plate 212 are attached to the first surface 101 and the second heat insulation plate 212 is attached to the second surface 102. There may be two electromagnetic induction wire reels 220, which are a first electromagnetic induction wire reel 221 and a second electromagnetic induction wire reel 222, respectively. The first electromagnetic induction wire reel 221 is attached to the first insulation board 211 and the second electromagnetic induction wire The disk 222 is attached to the second heat insulation plate 212. Therefore, both the first electromagnetic induction wire reel 221 and the second electromagnetic induction wire reel 222 can inductively heat the induction heating sheet 200, so that the heating efficiency of the induction heating sheet 200 can be improved.

As shown in FIG. 5 to FIG. 8, according to some embodiments of the present application, the outdoor heat exchanger 10 may be a micro-channel plate 110. The micro-channel board 110 is a board having multiple micro-channels, and the refrigerant can pass through the multiple micro-channels. The micro-channel plate 110 can increase the contact area between the refrigerant and the wall of the micro-channel tube, thereby improving the heat transfer performance of the micro-channel plate 110. The diameter of the microchannel is between 10 μm and 1000 μm.

As shown in FIG. 1 to FIG. 11, in some embodiments of the present application, the induction heating sheet 200 is attached to the outer peripheral wall of the outdoor heat exchanger 10. Thereby, the contact area of the induction heating sheet 200 and the outdoor heat exchanger 10 can be enlarged, and the heating efficiency of the induction heating sheet 200 can be improved.

As shown in FIG. 6, in some embodiments of the present application, the electromagnetic heating assembly 20 includes two induction heating sheets 200. The two induction heating sheets 200 are located on opposite outer surfaces of the micro-channel plate 110, and the heat insulation plate 210 and the middle thereof A piece of induction heating sheet 200 is attached. For example, the microchannel plate 110 may have two opposite surfaces (upper and lower as shown in FIG. 6), wherein an induction heating sheet 200 is attached on the upper surface, and an induction heating sheet 200 is attached on the lower surface. A heat insulation plate 210 may be attached to a side of the induction heating sheet 200 on the lower surface remote from the microchannel plate 110, and an electromagnetic induction wire reel 220 may be provided on a side of the heat insulation plate 210 remote from the induction heating sheet 200. Therefore, the micro-channel plate 110 can be heated by using two induction heating sheets 200, and the micro-channel plate 110 is sandwiched between the two induction heating sheets 200, and the induction heating sheet 200 and the micro-channel plate 110 can be sufficiently improved. Contact area, thereby improving the defrosting efficiency and heating efficiency of the micro-channel plate 110. In the description of the present application, it should be understood that the terms “upper” and “lower” are based on the orientation or position relationship shown in FIG. 6, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply. The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

As shown in FIG. 7, in some embodiments of the present application, there may be two microchannel plates 110, and an induction heating sheet 200 is sandwiched between the two microchannel plates 110. For example, the two microchannel plates 110 can be stacked and spaced up and down (upper and lower as shown in FIG. 7). The induction heating sheet 200 is located between the two microchannel plates 110, and the induction heating sheet 200 can be connected to two microchannels. The plates 110 are all in contact with each other. A heat insulation plate 210 may be attached to a side of the microchannel plate 110 located farther away from the induction heating sheet 200, and an electromagnetic induction wire coil 220 may be attached to a side of the heat insulation plate 210 remote from the microchannel plate 110. Therefore, the two sides of the induction heating sheet 200 can heat the two microchannel plates 110 respectively, so that the heat of the induction heating sheet 200 can be fully utilized, the working efficiency of the electromagnetic heating module 20 can be improved, and the production of the heat pump system 1 can be reduced. cost. In the description of this application, it should be understood that the terms “upper” and “lower” are based on the orientation or positional relationship shown in FIG. 7, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply. The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

As shown in FIG. 8, according to some embodiments of the present application, the electromagnetic heating component 20 may be two groups, and the induction heating sheet 200, the heat insulation plate 210, and the electromagnetic induction wire coil 220 of each group of the electromagnetic heating component 20 are sequentially stacked, and the induction heating The sheet 200 is attached to the outer surface of the outdoor heat exchanger 10. Therefore, the micro-channel plate 110 can be heated by using two pieces of induction heating sheets 200, and each of the two pieces of induction heating sheets 200 corresponds to an electromagnetic induction wire plate 220, and the electromagnetic induction wire plate 220 can correspond to the corresponding induction heating piece. 200 for heating, so that the heating efficiency of the electromagnetic heating assembly 20 can be improved.

As shown in FIG. 8, in some embodiments of the present application, two sets of electromagnetic heating assemblies 20 are respectively disposed on opposite surfaces of the outdoor heat exchanger 10. For example, the outdoor heat exchanger 10 may be a micro-channel plate 110, two sets of electromagnetic heating components 20 may be respectively located on the upper and lower surfaces (as shown in FIG. 8) of the micro-channel plates 110, and induction heating in the two sets of electromagnetic heating components 20 The sheets 200 are in direct contact with the micro-channel plate 110, and the heat-insulating plates 210 in each group of the electromagnetic heating assembly 20 are located between the corresponding induction heating sheet 200 and the electromagnetic induction wire tray 220. Therefore, the micro-channel plate 110 can be heated by using two induction heating sheets 200, and the micro-channel plate 110 is sandwiched between the two induction heating sheets 200, and the induction heating sheet 200 and the micro-channel plate 110 can be sufficiently improved. Contact area, thereby improving the defrosting efficiency and heating efficiency of the micro-channel plate 110. The two induction heating plates 200 respectively correspond to an electromagnetic induction wire plate 220, and the electromagnetic induction wire plate 220 can heat the corresponding induction heating plate 200, thereby improving the heating efficiency of the electromagnetic heating assembly 20. In the description of the present application, it should be understood that the terms “upper” and “lower” are based on the orientation or positional relationship shown in FIG. 8, and are only for the convenience of describing the present application and simplifying the description, not for indicating or suggesting The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

As shown in FIGS. 9-10, according to some embodiments of the present application, the electromagnetic induction wire reel 220 may be circular, oval, or polygonal.

According to the control method of the heat pump system 1 according to the embodiment of the present application, the heat pump system is the heat pump system 1 as described above. The heat pump system 1 includes a temperature sensor for detecting a compressor exhaust temperature, and the exhaust temperature detected by the temperature sensor is T. To set the target exhaust temperature of the heat pump system 1 to T ₀ , the control method includes: the heat pump system is in a heating start mode or a defrost mode, and the electromagnetic heating component is started.

According to the control method of the heat pump system 1 in the embodiment of the present application, when the heat pump system 1 is in a heating start mode or a defrost mode, the outdoor heat exchanger 10 can be heated and heated by the electromagnetic heating component 20, so that the outdoor heat exchanger can be improved. 10 Defrost efficiency and heating efficiency, improve the freezer starting capability of the heat pump system 1, avoid the situation that the reliability of the compressor is not reduced due to the exhaust temperature, and further improve the performance of the heat pump system 1. In addition, the electromagnetic heating component 20 uses the principle of magnetic field to release heat, which not only has high safety performance, but also has the advantages of simple structure, high heating accuracy, and easy control. In addition, the heat insulation plate 210 can isolate the electromagnetic induction wire coil 220 and the induction heating sheet 200 to prevent the induction heating sheet 200 from affecting the working performance of the electromagnetic induction electric coil.

As shown in FIG. 12, according to some embodiments of the present application, in a normal heating mode, if T <T ₀ and the compressor reaches a maximum frequency, the electromagnetic heating component is started. If T≥T ₀ and the compressor does not reach the maximum frequency, the electromagnetic heating component stops heating. As a result, the heat pump system can perform heating by combining air flow with electromagnetic heating components, which can improve the heating efficiency of the heat pump system, and further improve the user's physical comfort. Conditions that affect the reliability of the compressor can also avoid the situation where the exhaust gas temperature is too high and the lubricating oil will be carbonized.

The heat pump system 1 and the control method thereof according to the embodiments of the present application will be described in detail below with reference to FIGS. 1 to 12. It is to be understood that the following description is only an exemplary description, and not a specific limitation to the present application.

The purpose of this application is to overcome the problems of using a heat pump system in low-temperature heating in the related art to improve the start-up capacity of the freezer slowly, the exhaust temperature is insufficient, the refrigerated oil is discharged, the defrost speed is slow, and the heating effect is poor. , Propose a hybrid low temperature and strong heat pump system that can combine air with exhaust gas heating. By adding electromagnetic heating components at the outdoor heat exchanger, it can be protected from the influence of ambient temperature and the heating capacity does not decline below -20 degrees. No electric auxiliary heating is needed, which can meet the rapid heating, double the speed of hot air to start heating, and quickly feel comfortable. Fast defrost, double the defrost speed, and quickly restore the effect of comfortable experience.

In order to achieve the above object, the heat pump system 1 of the embodiment of the present application has the characteristics of achieving normal cooling and enhanced heating. The heat source in the heating mode includes two types of heat source power: air energy and electromagnetic heating component 20 for heating.

By installing an electromagnetic heating component 20 on the outdoor heat exchanger 10, the refrigerant in the outdoor heat exchanger 10 is further heated to obtain more heat energy and be transmitted to the room, thereby meeting the indoor comfort requirements. At the same time, in order to ensure that the temperature of the electromagnetic heating component 20 is not too high, which causes the refrigerated oil to carbonize when it encounters high temperatures, the output power of the electromagnetic heating component 20 needs to be adjusted according to the exhaust temperature of the heat pump system 1.

In order to solve the problems that the freezer starts slowly and the exhaust temperature is insufficient, it is easy to carry the refrigerated oil discharge oil separator, which affects the reliability of the compressor, the slow defrost speed, and the poor normal heating effect. The control logic of the heat pump system 1 is as follows:

As shown in FIG. 12, in the heating start mode and the defrost mode, the electromagnetic heating component is turned on preferentially to adjust the output heating power of the electromagnetic heating component according to the target exhaust temperature T ₀ . When the heating starts or the defrost ends, it enters the normal heating mode judgment. In the normal heating mode, it is determined whether the exhaust temperature is lower than the maximum value. If yes, if the compressor reaches the maximum frequency and the exhaust temperature does not reach the target value T ₀ , then continue to turn on the heating device to adjust the output heating power of the electromagnetic heating component according to the target exhaust temperature T ₀ to make up for the compressor has reached Maximum, but it does not provide a good comfort experience. In this process, the change of exhaust gas temperature is continuously determined to meet the requirement that it will not exceed the maximum value. If the maximum value of the exhaust temperature is exceeded, and the compressor does not reach the maximum frequency, the output of the electromagnetic heating component is stopped, and the heating output is adjusted by the compressor itself. During the adjustment process, if the compressor reaches the maximum frequency and the exhaust temperature does not reach the target value, the heating device is continuously turned on to adjust the output heating power according to the target exhaust temperature T ₀ . In this way, the heating power of the electromagnetic heating module is repeatedly feedback-controlled.

As shown in FIG. 1 to FIG. 11, the electromagnetic heating module 20 includes an induction heating sheet 200, a heat insulation plate 210, and an electromagnetic induction wire coil 220. The electromagnetic induction wire coil 220 can generate an alternating magnetic field to generate eddy currents with the induction heating sheet 200. Thermal energy. The form of the electromagnetic induction wire reel 220 can be various, elliptical, circular, rectangular, and can be combined in quantity according to demand. The induction heating sheet 200 may be an iron induction heating sheet containing an iron element. The induction heating sheet 200 can form an embedded or outsourced structure with the outdoor heat exchanger 10, so that the thermal conversion rate between the induction heating sheet 200 and the outdoor heat exchanger 10 can be improved, and the heat of the induction heating sheet 200 can be adjusted quickly, and the electromagnetic heating component 20 can change the power output. Considering that the electromagnetic induction wire coil 220 needs to dissipate heat, it cannot directly contact the iron induction heating plate. The outdoor heat exchanger 10 may be made of metal or non-metal material, and includes a flow path head and a connection pipe to connect with the refrigerant system. In addition, the iron induction heating sheet 200 may be located inside the refrigerant flow path to directly heat the refrigerant, or may be located outside the refrigerant flow path to indirectly heat the refrigerant.

When the induction heating sheet 200 is built inside the outdoor heat exchanger 10, the heating efficiency is high, and the refrigerant can be heated inside the outdoor heat exchanger 10. When the induction heating sheet 200 is externally mounted, the induction heating sheet 200 is closely adhered to the outer surface of the outdoor heat exchanger 10 and is separated by a heat insulation plate 210. The outdoor heat exchanger 10 may be a micro-channel plate 110 or a heat exchange tube 100.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “exemplary embodiments”, “examples”, “specific examples”, or “some examples”, etc., means that the implementation is combined The specific features, structures, materials, or characteristics described in the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims

A heat pump system, comprising:

Outdoor heat exchanger

An electromagnetic heating component, which includes an induction heating sheet, a heat insulation plate, and an electromagnetic induction wire coil, the induction heating sheet is in contact with the outdoor heat exchanger, and the electromagnetic induction wire coil is attached to the heat insulation plate, The thermal insulation plate is connected to the outdoor heat exchanger or the induction heating plate, and the induction heating plate is communicatively connected to the electromagnetic induction wire plate.
The heat pump system according to claim 1, wherein the outdoor heat exchanger is a heat exchange tube, and the induction heating plate is located in the heat exchange tube,

The heat insulation plate is attached to an outer peripheral wall of the heat exchange tube.
The heat pump system according to claim 2, wherein two opposite outer surfaces of the heat exchange tube are a first surface and a second surface,

There are two heat insulation plates, which are a first heat insulation plate and a second heat insulation plate, respectively. The first heat insulation plate is attached to the first surface, and the second heat insulation plate is attached to the second surface. ;

There are two electromagnetic induction wire reels, which are a first electromagnetic induction wire reel and a second electromagnetic induction wire reel, respectively. The first electromagnetic induction wire reel is attached to the first insulation board, and the second electrical The magnetic induction wire plate is attached to the second heat insulation plate.
The heat pump system according to claim 1, wherein the outdoor heat exchanger is a micro-channel plate.
The heat pump system according to claim 4, wherein the induction heating sheet is attached to an outer peripheral wall of the outdoor heat exchanger.
The heat pump system according to claim 4 or 5, wherein the electromagnetic heating component comprises two pieces of the induction heating piece, and the two pieces of the induction heating piece are located on opposite outer surfaces of the microchannel plate,

The heat insulation plate is attached to one of the induction heating pieces.
The heat pump system according to any one of claims 4-6, wherein there are two microchannel plates, and the induction heating sheet is sandwiched between the two microchannel plates.
The heat pump system according to any one of claims 1 to 7, wherein the electromagnetic heating components are two groups, and each group of the induction heating sheet, the heat insulation plate, and the electromagnetic heating component The electromagnetic induction wire trays are sequentially stacked, and the induction heating sheet is attached to the outer surface of the outdoor heat exchanger.
The heat pump system according to claim 8, wherein two sets of the electromagnetic heating components are respectively disposed on opposite surfaces of the outdoor heat exchanger.
The heat pump system according to any one of claims 1 to 9, wherein the electromagnetic induction wire reel is circular, oval, or polygonal.
A control method of a heat pump system, wherein the heat pump system is a heat pump system according to any one of claims 1-10,

The heat pump system includes a temperature sensor for detecting a compressor exhaust temperature, the exhaust temperature detected by the temperature sensor is T, and a target exhaust temperature of the heat pump system is set to T 0 ,

The control method includes:

The heat pump system is in a heating start mode or a defrost mode, and the electromagnetic heating component is started.
The method for controlling a heat pump system according to claim 11, wherein in a normal heating mode,

If T <T 0 and the compressor reaches the maximum frequency, start the electromagnetic heating component;

If T ≧ T 0 and the compressor does not reach the maximum frequency, the electromagnetic heating component stops heating.