Evaporation self-auxiliary heating structure

Abstract

The invention provides an evaporation self-auxiliary heating structure, and relates to the technical field of air conditioners. An evaporation self-auxiliary heating structure comprises an air conditioner circulation pipeline and a defrosting assembly. A compressor, a condenser, a first expansion valve and an evaporator are sequentially connected to the air conditioner circulation pipeline in series. The defrosting assembly comprises a defrosting pipeline and a self-auxiliary heating coil pipe. One end of the defrosting pipeline communicates with the exhaust end of the compressor, and the other end communicates with the inlet end of the evaporator. The self-auxiliary heating coil is connected to the defrosting pipeline in series, the self-auxiliary heating coil is arranged at the frosting position of the evaporator, and heat exchange can be conducted between the self-auxiliary heating coil and the frosting position of the evaporator. The defrosting pipeline is connected with a first control valve in series, and the first control valve is connected with a control unit. According to the invention, the defrosting work can be efficiently completed in an energy-saving manner under the condition that the normal heating operation is not influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an evaporation self-auxiliary heating structure. BACKGROUND

[0002] In a low-temperature or high-humidity environment, the surface of the evaporator of the air conditioning system is prone to frost due to the condensation of water vapor in the air. The accumulation of frost layer can significantly reduce the heat exchange efficiency of the evaporator, leading to the decrease of the refrigeration or heating performance of the air conditioning system, the increase of energy consumption, and even the occurrence of compressor liquid knock and other faults. The traditional defrosting method usually adopts reverse cycle defrosting (i.e. four-way valve reversing, making the system temporarily switch to refrigeration mode, and using the heat of the condenser to melt the frost on the evaporator) or electric heating defrosting (installing an electric heating element near the evaporator to directly heat and defrost by electric energy). However, these methods have the following defects: 1. The reverse cycle defrosting interrupts the normal heating process, leading to indoor temperature fluctuation and poor user experience, and frequent switching of system mode may shorten the service life of the compressor. 2. The process of reverse cycle operation is relatively long, and the defrosting time is increased, affecting the defrosting efficiency. 3. The electric heating defrosting needs to consume a large amount of electric energy, and the energy efficiency ratio is low. Moreover, the electric heating element is exposed to a humid environment for a long time and is prone to aging, which poses a safety hazard. Therefore, the industry urgently needs a defrosting technology that is energy-saving, efficient and does not affect the normal heating operation. SUMMARY

[0003] The purpose of the present application is to provide an evaporation self-auxiliary heating structure which can complete the defrosting work in an energy-saving and efficient manner without affecting the normal heating operation.

[0004] The embodiments of the present application are implemented as follows:

[0005] The present application provides an evaporation self-auxiliary heating structure, comprising:

[0006] An air conditioner circulating pipeline, wherein a compressor, a condenser, a first expansion valve and an evaporator are sequentially connected in series on the air conditioner circulating pipeline;

[0007] A defrosting assembly, wherein one end of a defrosting pipeline is in communication with the exhaust end of the compressor, the other end of the defrosting pipeline is in communication with the inlet end of the evaporator, a self-auxiliary heating coil is connected in series on the defrosting pipeline, the self-auxiliary heating coil is arranged at the frost formation position of the evaporator, and the self-auxiliary heating coil can exchange heat with the frost formation position of the evaporator;

[0008] A first control valve is connected in series on the defrosting pipeline, and the first control valve is connected with a control unit.

[0009] In some embodiments of the present application, a frost monitoring device for monitoring whether frost is formed is arranged at the frost formation position of the evaporator, and the frost monitoring device is connected with the control unit.

[0010] In some embodiments of the present application, the frost monitoring device comprises a first temperature sensor for monitoring the external environment temperature and a second temperature sensor for monitoring the temperature at the frosting position of the evaporator, both of which are connected to the control unit.

[0011] In some embodiments of the present application, the frost monitoring device comprises an image sensor for collecting image information of the frosting position of the evaporator, which is connected to the control unit.

[0012] In some embodiments of the present application, the first control valve is an electronic expansion valve.

[0013] In some embodiments of the present application, the self-heating coil is a uniformly arranged serpentine structure.

[0014] In some embodiments of the present application, the self-heating coil is a copper pipe.

[0015] In some embodiments of the present application, the self-heating coil is provided with an air flow generator, which is a fan, the fan is directed towards the self-heating coil, and the air flow generated by the fan passes through the self-heating coil to reach the frosting position of the evaporator.

[0016] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects:

[0017] The application provides an evaporative self-heat structure. The air conditioner circulation pipeline of the air conditioner compresses low-temperature and low-pressure gas medium formed by an evaporator through a compressor to form high-temperature and high-pressure gas medium. The high-temperature and high-pressure gas is condensed by a condenser to form medium-temperature and high-pressure liquid medium. The medium-temperature and high-pressure liquid medium passes through a first expansion valve to form low-temperature and low-pressure liquid medium. The low-temperature and low-pressure liquid medium passes through the evaporator to form low-temperature and low-pressure gas medium. In this way, the condenser is in the room and can perform heat exchange. The medium is circulated in the air conditioner circulation pipeline to realize temperature regulation. A part of the high-temperature and high-pressure gas formed by the compressor is introduced into the defrosting pipeline in the defrosting assembly. The high-temperature and high-pressure gas enters the self-heat coil and exchanges heat with the frost on the evaporator. The heat exchange makes the frost on the evaporator warm, which can defrost. The control unit is used to control the opening of the first control valve to control the disconnection and connection of the defrosting pipeline and the flow of the high-temperature and high-pressure gas medium in the defrosting pipeline. In this way, the flow of the high-temperature and high-pressure gas can be controlled according to the demand. In this way, the heat exchange efficiency of the high-temperature and high-pressure gas in the self-heat coil can be effectively controlled. The heat exchange efficiency is controlled according to the actual demand to avoid the temperature of the frost on the evaporator being too high to affect the normal operation of the evaporator. Therefore, the evaporative self-heat structure can complete the defrosting work efficiently and energy-savingly without affecting the normal heating operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 The figure is a structural schematic diagram of the embodiment of the present application.

[0020] Figure 2 The figure is a control block diagram of the control unit in the embodiment of the present application.

[0021] Figure 3 The figure is a mounting structural schematic diagram of the self-heat coil in the embodiment of the present application.

[0022] The figure is a structural schematic diagram of the embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0025] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the terms "horizontal", "vertical", "overhang" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0029] In the description of the embodiments of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "arrange", "install", "connect", "connect" appear, they should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Embodiments

[0031] Please refer to Figures 1-2 The embodiment provides an evaporative self-heat structure, which comprises an air conditioner circulating pipeline 1 and a defrosting assembly. The air conditioner circulating pipeline 1 is sequentially connected with a compressor 2, a condenser 3, a first expansion valve 4 and an evaporator 5. The defrosting assembly comprises a defrosting pipeline 6 and a self-heat coil 7. One end of the defrosting pipeline 6 is communicated with an exhaust end of the compressor 2, and the other end is communicated with an inlet end of the evaporator 5. The self-heat coil 7 is connected in series on the defrosting pipeline 6. The self-heat coil 7 is arranged at a frost formation position of the evaporator 5, and can exchange heat with the frost formation position of the evaporator 5. A first control valve 8 is connected in series on the defrosting pipeline 6, and the first control valve 8 is connected with a control unit.

[0032] The air conditioner circulating pipeline 1 compresses the low-temperature and low-pressure gas medium formed through the evaporator 5 by the compressor 2 to form high-temperature and high-pressure gas medium. The high-temperature and high-pressure gas is condensed by the condenser 3 to form medium-temperature and high-pressure liquid medium. The medium-temperature and high-pressure liquid medium passes through the first expansion valve 4 to form low-temperature and low-pressure liquid medium. The low-temperature and low-pressure liquid medium passes through the evaporator 5 to form low-temperature and low-pressure gas medium. In this way, the condenser 3 is in the indoor environment and can exchange heat. The medium in the air conditioner circulating pipeline 1 reciprocally circulates to realize the temperature regulation function. In the defrosting assembly, the defrosting pipeline 6 actually introduces a part of the high-temperature and high-pressure gas formed after passing through the compressor 2. The part of the high-temperature and high-pressure gas enters the self-heat coil 7 and exchanges heat with the frost formation position of the evaporator 5 at the self-heat coil 7. The heat exchange makes the frost formation position of the evaporator 5 warm, which can play a defrosting role. The control unit is used to control the opening degree of the first control valve 8, so as to control the disconnection and connection of the defrosting pipeline 6 and the flow of the high-temperature and high-pressure gas medium in the defrosting pipeline 6. In this way, the flow of the high-temperature and high-pressure gas can be controlled according to the demand. In this way, the heat exchange efficiency of the high-temperature and high-pressure gas at the self-heat coil can be effectively controlled. According to the actual demand, the heat exchange efficiency is controlled to avoid that the temperature of the frost formation position of the evaporator 5 is too high to affect the normal operation of the evaporator 5. Therefore, the evaporative self-heat structure can complete the defrosting work in an energy-saving and efficient manner without affecting the normal heating operation.

[0033] Specifically, the control unit is connected with the first control valve 8, and can control the opening and closing of the first control valve 8 and the opening degree of the first control valve 8.

[0034] In some embodiments of the present embodiment, a frost monitoring device for monitoring whether frost is formed is arranged at the frost formation position of the evaporator 5, and the frost monitoring device is connected with the control unit. The frost monitoring device can transmit the detected frost information to the control unit, and the control unit analyzes and judges whether frost is formed according to a preset program. If it is judged that frost is formed, the control unit controls the first control valve 8 to open, so that the defrosting pipeline 6 is connected and defrosting work can be performed. In this way, automatic judgment of whether frost is formed can be realized, and automatic control of defrosting is realized, which greatly improves the defrosting efficiency and convenience.

[0035] Specifically, in the present embodiment, the frost monitoring device includes a first temperature sensor for monitoring the temperature of the external environment and a second temperature sensor for monitoring the temperature of the frost formation position of the evaporator 5. The first temperature sensor and the second temperature sensor are both connected with the control unit. The first temperature sensor is mainly used for monitoring the temperature of the external environment in real time, and the second temperature sensor is mainly used for monitoring the temperature of the frost formation position of the evaporator 5. The temperature information monitored by the first temperature sensor and the second temperature sensor is transmitted to the control unit. After obtaining the corresponding temperature information, the control unit analyzes and judges whether frost is formed at the frost formation position of the evaporator 5 according to a preset program.

[0036] In other embodiments, the frost monitoring device includes an image sensor (not shown in the figure) for collecting image information of the frost formation position of the evaporator 5, and the image sensor is connected with the control unit. The image sensor can collect image information of the frost formation position of the evaporator 5, and transmit the image information to the control unit, and the control unit can analyze and judge whether frost is formed at the frost formation position of the evaporator 5 according to a preset program.

[0037] It is worth noting that the image sensor can be a CMOS sensor, which has the advantages of high integration, low power consumption, high speed, and low cost.

[0038] In some embodiments of the present embodiment, the first control valve 8 is an electronic expansion valve. The second control valve is also an electronic expansion valve, which can be connected to the control unit, so that the control unit can control the operation of the electronic expansion valve. In the heat exchange process, the self-heat exchanger coil 7 functions as a condenser 3, which can convert high-temperature and high-pressure gas into medium-temperature and high-pressure liquid. The electronic expansion valve can convert the medium-temperature and high-pressure liquid medium after heat exchange in the self-heat exchanger coil 7 into low-temperature and low-pressure liquid medium. The electronic expansion valve has the same function as the first expansion valve 4, so that the low-temperature and low-pressure liquid medium formed after the medium-temperature and high-pressure liquid medium passes through the electronic expansion valve can be directly returned to the evaporator 5. In this way, the medium in the entire air conditioning circulation pipeline 1 is finally completely returned to the evaporator 5 to absorb heat, and then compressed by the compressor 2.

[0039] In normal operation, the air conditioning circulation pipeline 1 compresses the low-temperature and low-pressure gas medium formed in the evaporator 5 by the compressor 2 to form high-temperature and high-pressure gas medium. The high-temperature and high-pressure gas is condensed in the condenser 3 to dissipate heat and increase the indoor temperature, and forms medium-temperature and high-pressure liquid medium. The medium-temperature and high-pressure liquid medium passes through the first expansion valve 4 to form low-temperature and low-pressure liquid medium. The low-temperature and low-pressure liquid medium passes through the evaporator 5 to form low-temperature and low-pressure gas medium. In the above process, the first control valve 8 is in a closed state, and the defrosting pipeline 6 is disconnected at this time. When frost occurs, the information monitored by the frost monitoring device is transmitted to the control unit, and the control unit can analyze and determine whether frost occurs according to the information. If it is determined that frost occurs, the control unit will control the first control valve 8 to open, and at this time, part of the high-temperature and high-pressure gas formed after passing through the compressor 2 enters the defrosting pipeline 6 and exchanges heat with the frost area of the evaporator 5 when passing through the self-heat exchanger coil 7. The heat exchange makes the frost area of the evaporator 5 warm up, which can play a defrosting role. It should be noted that the high-temperature and high-pressure gas that does not enter the defrosting pipeline 6 will normally enter the condenser 3 to dissipate heat and circulate in the normal operation state.

[0040] It should be noted that the control unit can also determine the frost degree according to the received information. In this way, the opening of the first control valve 8 can be controlled according to the frost degree to adjust the flow of high-temperature and high-pressure gas entering the defrosting pipeline 6, so that defrosting can be performed according to the heat exchange of the frost degree, ensuring the defrosting effect, and at the same time, the temperature of the frost area of the evaporator 5 can be controlled within a certain range to avoid the temperature being too high to affect the normal operation of the evaporator 5.

[0041] Please refer to Figure 3In some embodiments of the present application, the self-heating coil 7 is in a uniform serpentine structure. The serpentine structure of the self-heating coil 7 can increase the medium travel distance, thereby improving the heat exchange effect and achieving better defrosting effect. Meanwhile, the serpentine structure increases the contact area with the frosting part of the evaporator 5, which can further improve the defrosting effect.

[0042] Specifically, in the present embodiment, the self-heating coil 7 is a copper pipe. The copper pipe has good heat conduction effect and can improve the heat exchange efficiency.

[0043] In the present embodiment, the self-heating coil 7 is provided with an air flow generator. The air flow generator is a fan 9, the fan 9 is directed to the self-heating coil 7, and the air flow generated by the fan 9 passes through the self-heating coil 7 to reach the frosting part of the evaporator 5. When the air flow generated by the fan 9 passes through the self-heating coil 7, most of the heat will be taken away to form a hot air flow. When the hot air flow reaches the frosting part of the evaporator 5, it can quickly dissipate heat, thereby increasing the temperature of the frosting part of the evaporator 5, so as to quickly melt the frost. At the same time, the hot air flow can also convert the melted water into water vapor and take it away, thereby achieving a drying effect.

[0044] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An evaporation self-boosting structure, characterized in that, The application relates to an air conditioner, which comprises the following parts: an air conditioner circulation pipeline, wherein a compressor, a condenser, a first expansion valve and an evaporator are connected in series on the air conditioner circulation pipeline; a defrosting assembly, which comprises a defrosting pipeline and a self-heat-supply coil pipe, one end of the defrosting pipeline is communicated with an exhaust end of the compressor, the other end of the defrosting pipeline is communicated with an inlet end of the evaporator, the self-heat-supply coil pipe is connected in series on the defrosting pipeline, the self-heat-supply coil pipe is arranged at a frost formation position of the evaporator, and the self-heat-supply coil pipe can exchange heat with the frost formation position of the evaporator; a first control valve is connected in series on the defrosting pipeline, and the first control valve is connected with a control unit.

2. The evaporative self-heating structure according to claim 1, wherein The frost formation position of the evaporator is provided with a frost formation monitoring device for monitoring whether frost is formed, and the frost formation monitoring device is connected with the control unit.

3. The evaporative self-heating structure of claim 2, wherein, The frost formation monitoring device comprises a first temperature sensor for monitoring an external environment temperature and a second temperature sensor for monitoring a temperature of the frost formation position of the evaporator, and the first temperature sensor and the second temperature sensor are connected with the control unit.

4. The evaporative self-heating structure of claim 2, wherein, The frost formation monitoring device comprises an image sensor for collecting image information of the frost formation position of the evaporator, and the image sensor is connected with the control unit.

5. The evaporative self-heating structure of claim 1, wherein, The first control valve is an electronic expansion valve.

6. The evaporative self-heating structure of claim 1, wherein, The self-heat-supply coil pipe is a uniformly arranged serpentine bending structure.

7. The evaporative self-heating structure of claim 1, wherein, The self-heat-supply coil pipe is a copper pipe.

8. The evaporative self-heating structure according to any one of claims 1-7, characterized in that, An air flow generator is arranged at the self-heat-supply coil pipe, the air flow generator is a fan, the fan faces the self-heat-supply coil pipe, and air flow generated by the fan passes through the self-heat-supply coil pipe and reaches the frost formation position of the evaporator.

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