CN219735680U - Defrosting structure of water pan and heat pump unit - Google Patents

Abstract

The utility model relates to the technical field of heat pumps, and particularly discloses a defrosting structure of a water receiving disc and a heat pump unit, wherein the defrosting structure of the water receiving disc comprises: the condenser is arranged at one side of the water receiving disc and is provided with a gaseous refrigerant inlet, a liquid refrigerant outlet and a first heat pipe channel, and the condenser is used for being connected with the water receiving disc of the heat pump unit; the evaporator is used for absorbing the heat of the control main board and is provided with a liquid refrigerant inlet, a gaseous refrigerant outlet and a second heat pipe channel, and the evaporator is positioned below the condenser; the refrigerant pipeline is communicated with the gaseous refrigerant inlet and the gaseous refrigerant outlet and is communicated with the liquid refrigerant outlet and the liquid refrigerant inlet; the refrigerant medium absorbs heat of the control main board from the evaporator and evaporates to form a gaseous refrigerant, and the gaseous refrigerant flows to the condenser to provide heat for the water receiving disc and condenses into a liquid refrigerant. The defrosting structure of the water receiving disc transfers the heat of the control main board to the water receiving disc, and can avoid freezing and recover the heat, thereby improving the heating efficiency, saving energy, protecting environment and avoiding electric leakage.

Description

Defrosting structure of water pan and heat pump unit

Technical Field

The utility model relates to the technical field of heat pumps, in particular to an antifreezing structure of a water receiving disc and a heat pump unit.

Background

At present, heat is generally absorbed through an air heat exchanger (evaporator) when the heat pump unit heats in a low-temperature environment, so that frosting is often generated on the surface of the air heat exchanger. In order to ensure the heating efficiency, the heat pump unit is generally switched to a defrosting mode, and defrosting water generated by defrosting is collected and discharged through a water receiving disc positioned at the bottom of the air heat exchanger. However, in the actual defrosting process, the temperature of the defrosting water reaching the water receiving disc is close to the freezing point, and the defrosting water is easy to freeze, so that ice blockage is caused, the unit defrosting is not thorough, and the heating capacity and heating efficiency of the heat pump unit are seriously affected. In order to solve the problem of icing of the water pan, an electric heater is generally arranged on the water pan, and electric energy is converted into heat energy to heat defrosting water and ice crystals to a temperature above the freezing point, so that the defrosting water is prevented from icing.

However, the defrosting scheme of the water pan in the prior art needs the heat pump unit to consume extra electric energy to provide heat, so that the heat pump unit has the defects of low heating efficiency and increased cost. Meanwhile, the electric heater is easy to dry and overheat, and the electric heater is easy to age after being exposed in the air for a long time, so that conductors in the electric heater are also easy to directly contact with defrosting water to cause the danger of electric leakage.

Disclosure of Invention

The aim of the embodiment of the utility model is that: the utility model provides a defrosting pan structure and heat pump set, it can solve among the prior art defrosting pan easily frozen problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, there is provided a defrosting structure for a water tray, comprising:

the water receiving disc is used for receiving and discharging water of the outdoor heat exchanger of the heat pump unit;

the condenser is arranged at one side of the water receiving disc and is used for providing heat for the water receiving disc, and is provided with a gaseous refrigerant inlet, a liquid refrigerant outlet and a first heat pipe channel, and the first heat pipe channel is communicated between the gaseous refrigerant inlet and the liquid refrigerant outlet;

the evaporator is used for absorbing heat of the control main board and is provided with a liquid refrigerant inlet, a gaseous refrigerant outlet and a second heat pipe channel, the second heat pipe channel is communicated between the liquid refrigerant inlet and the gaseous refrigerant outlet, and the evaporator is positioned below the condenser in the height direction;

a refrigerant pipe connecting the gaseous refrigerant inlet and the gaseous refrigerant outlet, and connecting the liquid refrigerant outlet and the liquid refrigerant inlet;

a refrigerant medium; when the heat pump unit operates, the refrigerant medium absorbs heat of the control main board from the evaporator and evaporates to form a gaseous refrigerant, the gaseous refrigerant flows to the condenser to provide heat for the water receiving disc and condenses into a liquid refrigerant, and the liquid refrigerant returns to the evaporator under the action of gravity.

As a preferred scheme of the defrosting structure of the water pan, the defrosting structure further comprises:

the flow path distributor is arranged on the cold pipeline of the gaseous refrigerant inlet and the gaseous refrigerant outlet;

the refrigerant pipeline comprises a plurality of refrigerant branch pipelines, each refrigerant branch pipeline is used for being connected with one condenser, the refrigerant branch pipelines are arranged between the gaseous refrigerant inlet and the flow path distributor, and the flow path distributor distributes the gaseous refrigerant of the refrigerant pipeline to a plurality of refrigerant branch pipelines and flows into a plurality of condensers.

As a preferred scheme of the defrosting structure of the water pan, the defrosting structure further comprises:

and the heat conducting layer is arranged between the condenser and the water receiving disc and/or between the evaporator and the control main board.

As a preferred scheme of the defrosting structure of the water pan, the defrosting structure further comprises:

the heat preservation layer is arranged on one side of the condenser, which is away from the water receiving disc, and/or on one side of the evaporator, which is away from the control main board.

As a preferred scheme of the defrosting structure of the water pan, the defrosting structure further comprises:

the needle valve is communicated with the refrigerant pipeline and used for opening and closing the refrigerant pipeline.

As a preferable scheme of the defrosting structure of the water receiving disc, the surface of the condenser is inclined towards the liquid refrigerant outlet relative to the horizontal plane.

As a preferred scheme of the defrosting structure of the water pan, the defrosting structure further comprises:

the liquid storage tank is arranged in a refrigerant pipeline between the liquid refrigerant outlet and the liquid refrigerant inlet and is used for storing refrigerant media.

As a preferred scheme of the defrosting structure of the water pan, in Gao Dufang, the lowest point of the condenser is higher than the highest point of the evaporator, the position of the gaseous refrigerant outlet is higher than the position of the liquid refrigerant inlet, and the liquid storage tank is communicated with the liquid refrigerant inlet.

As a preferable scheme of the defrosting structure of the water receiving disc, the length of the condenser is more than one third of the length of the water receiving disc.

In a second aspect, a heat pump unit is provided, including organism, control mainboard and the structure is prevented frostbite by the water collector, be provided with the water collector on the organism with control mainboard, the condenser of the structure is prevented frostbite by the water collector is connected in the water collector, the evaporator of the structure is prevented frostbite by the water collector connect in the control mainboard.

The beneficial effects of the utility model are as follows:

the condenser is connected with the water receiving plate and the evaporator is connected with the control main board, and because the condenser and the evaporator are internally provided with the heat pipe channels, when refrigerant mediums exist in the heat pipe channels, the refrigerant mediums are heated to expand the volume and even gasify in a phase change manner by utilizing the fluid principle of capillary action of the heat pipe, so that the refrigerant mediums spontaneously flow along the refrigerant pipeline, other refrigerant mediums in other refrigerant pipelines are caused to continuously flow, the heat of the control main board is kept to be absorbed, the water receiving plate is heated, and the heat exchange efficiency of the refrigerant mediums with the water receiving plate and the control main board can be improved. In addition, no matter the heat pump unit is in a heating mode or a defrosting mode, the control main board needs to keep working to generate heat. The heated refrigerant medium reaches the condenser communicated with the gaseous refrigerant inlet through the gaseous refrigerant outlet and the refrigerant pipeline, and flows in the first heat pipe channel and exchanges heat with the water receiving disc, so that defrosting water in the water receiving disc is heated, and the water receiving disc is prevented from being frozen. And the refrigerant medium after heat exchange with the water receiving disc enters the refrigerant pipeline from the liquid refrigerant outlet and flows back to the evaporator, and the heat of the main board is continuously absorbed and controlled to form heat exchange circulation of the condenser and the evaporator.

Therefore, the defrosting pan antifreezing structure does not need to additionally arrange an electric heater to reduce the energy efficiency and the cost of the heat pump unit, and also avoids the safety problem caused by dry heating or overheating of the electric heater. Heat generated by the control main board is transferred into the water receiving tray through the water receiving tray anti-freezing structure, the temperature of defrosting water can be increased to avoid freezing, and the heat of the control main board can be recycled, so that the heating capacity and heating energy efficiency of the heat pump unit are improved, the energy is saved, the environment is protected, and the electric leakage danger caused by the electric heater is avoided.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an antifreezing structure of a water pan according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional structure of a condenser according to an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view of an evaporator according to an embodiment of the utility model.

Fig. 4 is a schematic structural diagram of an antifreezing structure of a water pan according to another embodiment of the present utility model.

Fig. 5 is a schematic structural diagram of a heat pump unit according to an embodiment of the present utility model.

Fig. 6 is a side view of a heat pump unit according to an embodiment of the present utility model.

In the figure:

1. a condenser; 11. a gaseous refrigerant inlet; 12. a liquid refrigerant outlet; 13. a first heat pipe channel;

2. an evaporator; 21. a liquid refrigerant inlet; 22. a gaseous refrigerant outlet; 23. a second heat pipe channel;

3. a refrigerant pipe; 31. a refrigerant branch pipe; 5. a flow path distributor; 6. a heat conducting layer; 7. a heat preservation layer; 8. a needle valve; 9. a liquid storage tank; 101. a water receiving tray; 102. and controlling the main board.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model are described in further detail below, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 4 and 5, the heat pump unit controls the operation of the heat pump unit through the control main board 102 during the operation process, and thus, the control main board 102 generates a large amount of heat during the operation process. According to the utility model, the evaporator 2 is used for acquiring the heat of the control main board 102, and the refrigerant pipeline 3 is used for transmitting the heat of the drive main board 102 to the water receiving disc 101, so that the water receiving disc 101 is heated, and water of the water receiving disc 101 is prevented from icing.

Specifically, the refrigerant medium in the refrigerant pipeline 3 is a liquid refrigerant at normal temperature, when the heat pump unit is in a heating mode or a defrosting mode, the control main board 102 needs to keep working, heat is also always generated, the heat radiated by the control main board 102 is absorbed by the evaporator 2, the liquid refrigerant medium in the second heat pipe channel 23 of the evaporator 2 absorbs the heat and forms a gaseous refrigerant, the gaseous refrigerant enters the first heat pipe channel 13 of the condenser 1 below the water receiving disc 101 through the refrigerant pipeline 3, the gaseous refrigerant condenses and radiates heat in the condenser 1, the heat radiated by the control main board 102 is released to the water receiving disc 101, and the gaseous refrigerant condenses into the liquid refrigerant during the period. The liquid refrigerant flows back to the evaporator 2 through the refrigerant pipeline 3 to complete one-time refrigerant circulation and can enter the next refrigerant circulation.

It can be understood that when the water pan 101 is frozen, the heat emitted by the condenser 1 can melt ice in the water pan 101, so as to avoid water drain blockage caused by freezing.

Specifically, as shown in fig. 1 to 3, the present embodiment provides an antifreezing structure for a water tray, including:

the water pan 101, the water pan 101 is located the outdoor heat exchanger below of heat pump set for receive and discharge the water of the outdoor heat exchanger of heat pump set.

The condenser 1 is provided with a gaseous refrigerant inlet 11, a liquid refrigerant outlet 12 and a first heat pipe channel 13 (shown in fig. 2), wherein the first heat pipe channel 13 is communicated between the gaseous refrigerant inlet 11 and the liquid refrigerant outlet 12, and the condenser 1 is used for being connected with a water receiving disc 101 of the heat pump unit;

an evaporator 2 having a liquid refrigerant inlet 21, a gaseous refrigerant outlet 22 and a second heat pipe channel 23 (as shown in fig. 3), wherein the second heat pipe channel 23 is communicated between the liquid refrigerant inlet 21 and the gaseous refrigerant outlet 22, and the evaporator 2 is used for connecting a control main board 102 of the heat pump unit;

a refrigerant pipeline 3 which is communicated with the gaseous refrigerant inlet 11 and the gaseous refrigerant outlet 22 and is communicated with the liquid refrigerant outlet 12 and the liquid refrigerant inlet 21;

a refrigerant medium; when the heat pump unit operates, the refrigerant medium absorbs heat of the control main board 102 from the evaporator 2 and evaporates to form a gaseous refrigerant, the gaseous refrigerant flows to the condenser 1 to provide heat for the water receiving disc 101 and condenses into a liquid refrigerant, and the liquid refrigerant returns to the evaporator 2 under the action of gravity.

According to the utility model, the condenser 1 is connected with the water receiving disc 101 and the evaporator 2 is connected with the control main board 102, and heat pipe channels are arranged in the condenser 1 and the evaporator 2. The utility model causes the refrigerant medium in the evaporator 2 to absorb heat and change phase to flow along the second heat pipe channel 23. The heated refrigerant medium reaches the condenser 1 communicated with the gaseous refrigerant inlet 11 through the gaseous refrigerant outlet 22 and the refrigerant pipeline 3, and flows in the first heat pipe channel 13 and exchanges heat with the water receiving disc 101 at the moment, so that the defrosting water in the water receiving disc 101 is heated, and the water receiving disc 101 is prevented from freezing. The refrigerant medium after heat exchange with the water pan 101 enters the refrigerant pipeline 3 from the liquid refrigerant outlet 12 and flows back to the evaporator 2, and the heat of the control main board 102 is continuously absorbed, so that the heat exchange cycle of the condenser 1 and the evaporator 2 is formed.

The defrosting pan antifreezing structure does not need to additionally arrange an electric heater to reduce the energy efficiency and the cost of the heat pump unit, and also avoids the safety problem caused by dry heating or overheating of the electric heater. The heat generated by the control main board 102 is transferred into the water receiving tray 101 through the water receiving tray anti-freezing structure, the temperature of defrosting water can be increased to avoid freezing, and the heat of the control main board 102 can be recycled, so that the heating capacity and heating energy efficiency of a heat pump unit are improved, the energy is saved, the environment is protected, and the electric leakage danger caused by the arrangement of an electric heater is avoided.

The specific heat exchange path of the refrigerant medium of the defrosting structure of the water pan in the embodiment is as follows:

since the control main board 102 continuously dissipates heat during normal operation, the evaporator 2 connected to the control main board 102 absorbs heat, so that the refrigerant medium in the second heat pipe channel 23 of the evaporator 2 absorbs heat to flow, and can change from liquid phase to gas phase, or flow as a result of thermal expansion, so that the refrigerant medium enters the refrigerant pipeline 3 through the gas refrigerant outlet 22, flows along the refrigerant pipeline 3 to the gas refrigerant inlet 11 and enters the first heat pipe channel 13 of the condenser 1. The heated refrigerant medium exchanges heat with the water receiving disc 101 in the first heat pipe channel 13, so that defrosting water in the water receiving disc 101 is heated, freezing of the water receiving disc 101 is avoided, the refrigerant medium after heat exchange continuously flows to the liquid refrigerant outlet 12 along the first heat pipe channel 13 and enters the refrigerant pipeline 3, and under the pressure of an inner cavity (a cavity formed by the communication of the first heat pipe channel 13, the refrigerant pipeline 3 and the second heat pipe channel 23) of the water receiving disc antifreezing structure, the refrigerant medium flows back to the liquid refrigerant inlet 21 along the refrigerant pipeline 3, enters the evaporator 2 again to exchange heat with the control main board 102, and heat exchange circulation of the refrigerant medium in the water receiving disc antifreezing structure is realized.

In a preferred embodiment, the condenser 1 and the evaporator 2 are both microchannel heat exchangers, the principle of operation of which is: the refrigerant medium enters the collecting pipe through the inlet end of the collecting pipe (namely, the gaseous refrigerant inlet 11 or the liquid refrigerant inlet 21) and then enters the flat pipe (namely, the first heat pipe channel 13 or the second heat pipe channel 23) of the micro-channel heat exchanger through the collecting pipe, and heat exchange is carried out between the refrigerant medium and the air outside in the process of flowing in the flat pipe, so that refrigeration or heating is realized. In this embodiment, the preferred refrigerant medium is R134a, and the internal cavity of the defrosting structure of the water pan needs to be pumped to a vacuum state, and then the refrigerant medium accounting for 50% to 70% of the volume of the internal cavity is filled.

For the first heat pipe channel 13 and the second heat pipe channel 23, the heat pipes have extremely high heat conductivity and good isothermicity, the heat transfer areas of the cold and hot sides can be changed at will, the heat can be transferred remotely, the temperature can be controlled, and the like. The embodiment can closely contact the evaporator 2 with the tube core of a high-power electronic device such as a thyristor, an IGBT, an IGCT and the like, and can directly and rapidly lead out the heat of the tube core, thereby outputting the heated refrigerant medium through the gaseous refrigerant outlet 22.

As for the refrigerant pipeline 3, a copper pipe with phi 6.35mm can be selected as the refrigerant pipeline 3 connected with the gaseous refrigerant outlet 22, while a copper pipe with phi 9.52mm is selected as the refrigerant pipeline 3 connected with the gaseous refrigerant inlet 11, and the refrigerant pipeline 3 with larger pipe diameter can accommodate more refrigerant media, so that the reflux efficiency of the refrigerant media is improved.

In a preferred embodiment, since the heat pump unit may provide a plurality of outdoor heat exchangers according to the needs of the user, the number of the water receiving trays 101 is also plural. The defrosting structure of the water receiving tray of the present utility model can heat two or more water receiving trays 101.

Specifically, referring to fig. 1, when the number of the water-receiving trays 101 is more than two, the water-receiving tray antifreeze structure further includes a flow path distributor 5 disposed between the condenser 1 and the evaporator 2, such that the flow path distributor 5 is disposed on the refrigerant line 3 between the gaseous refrigerant outlet 22 and the gaseous refrigerant inlet 11. In addition, the refrigerant pipeline 3 includes a plurality of refrigerant branch pipelines 31, each refrigerant branch pipeline 31 is correspondingly connected with one condenser 1, and each refrigerant branch pipeline 31 is arranged between the corresponding gaseous refrigerant inlet 11 and the flow path distributor 5, so that the plurality of refrigerant branch pipelines 31 are connected to the flow path distributor 5, and the refrigerant medium in the refrigerant pipeline 3 can be split into each refrigerant branch pipeline 31 through the flow path distributor 5. The embodiment can split the heated gaseous refrigerant output from the evaporator 2 through the flow path distributor 5, and the split gaseous refrigerant enters each refrigerant branch pipe 31 and enters the gaseous refrigerant inlet 11 of each condenser 1 at the same time, so that the heated refrigerant medium is input into each condenser 1.

In this embodiment, only one refrigerant pipeline 3 may be disposed at the input end of the flow path distributor 5, and the output end of the flow path distributor 5 is provided with refrigerant branch pipelines 31 corresponding to the number of condensers 1, so that heat is obtained from only one control main board 102, and heat transfer to a plurality of water receiving discs 101 is achieved.

Particularly, referring to fig. 4, the defrosting structure of the water tray of the present utility model further includes the heat conducting layer 6, and the heat conducting layer 6 is disposed between the condenser 1 and the water tray 101, so that the heat conduction efficiency between the condenser 1 and the water tray 101 can be improved, the anti-icing effect of the water tray 101 can be further improved, and the heat loss of the condenser 1 when heating the water tray 101 can be reduced. Alternatively, the heat conducting layer 6 may be disposed between the evaporator 2 and the control motherboard 102, so as to improve the heat exchange efficiency between the evaporator 2 and the control motherboard 102, and fully absorb the heat dissipated by the control motherboard 102. If the heat conducting layer 6 is arranged between the condenser 1 and the water pan 101 and between the evaporator 2 and the control main board 102, the system heat exchange efficiency of the water pan antifreezing structure can be improved, so that the heating efficiency of the water pan 101 and the cooling efficiency of the control main board 102 are ensured, and the heat loss is also reduced.

In this embodiment, the heat conducting layer 6 may be made of heat conducting silica gel, graphene, heat conducting silicone grease, heat conducting silica gel, etc.

Optionally, referring to fig. 6, the defrosting structure of the water tray further includes an insulating layer 7, and the insulating layer 7 is disposed on a side of the condenser 1 facing away from the water tray 101, so as to reduce heat exchange between the condenser 1 and air, thereby reducing heat loss and indirectly improving heating efficiency of the water tray 101. Or, the heat-insulating layer 7 may be disposed on a side of the evaporator 2 away from the control main board 102, so as to reduce heat transfer between the evaporator 2 and air after heat absorption from the control main board 102, and reduce heat dissipation of the refrigerant medium during flowing, and improve heating efficiency of the water-receiving tray 101. Or, the heat insulation layers 7 can be arranged on the condenser 1 and the evaporator 2 at the same time, so that the heat conduction energy efficiency of the defrosting structure of the water pan is further improved, and the heat loss is also reduced.

The heat insulating layer 7 in this embodiment may be made of sponge, plastic foam, polyurethane, or the like.

Preferably, the defrosting structure of the defrosting pan further comprises a needle valve 8 communicated with the refrigerant pipeline 3, the refrigerant pipeline 3 is opened and closed through the needle valve 8, and the refrigerant pipeline 3 can be filled or discharged with refrigerant medium, so that the pressure balance of the inner cavity of the defrosting pan defrosting structure is maintained, and the influence of insufficient or excessive refrigerant medium on the flow of the refrigerant medium is avoided. More preferably, after the refrigerant medium is filled through the needle valve 8, a sealing layer, such as sealing glue, may be provided at the needle valve 8 to reduce the escape of the refrigerant medium due to the break-up of the needle valve 8.

In an alternative embodiment, the surface of the condenser 1 is inclined towards the liquid refrigerant outlet 12 relative to the horizontal plane, so that the refrigerant medium flows towards the liquid refrigerant outlet 12 under the action of gravity, which can reduce accumulation or blockage of the condensed refrigerant medium at the gaseous refrigerant inlet 11, avoid reducing the flow rate of the refrigerant medium from the refrigerant pipeline 3, and facilitate improving the flow rate of the refrigerant medium in the condenser 1. Preferably, the condenser 1 in the present embodiment is inclined at 5 to 10 degrees with respect to the horizontal plane in the width direction and at 3 to 5 degrees with respect to the horizontal plane in the length direction, so that the condenser 1 is inclined toward the liquid refrigerant outlet 12.

Particularly, the defrosting structure of the water pan further comprises a liquid storage tank 9, wherein the liquid storage tank 9 is arranged between the liquid refrigerant outlet 12 and the refrigerant pipeline 3 of the liquid refrigerant inlet 21, when the liquid refrigerant from the condenser 1 can firstly enter the liquid storage tank 9, a large amount of liquid refrigerant is prevented from accumulating in the evaporator 2, so that the liquid refrigerant of the evaporator 2 is incompletely or insufficiently gasified, and the amount of gaseous refrigerant in the evaporator 2 is reduced, so that the amount of gaseous refrigerant entering the condenser 1 is reduced, and the sufficient heat transfer cannot be realized; on the other hand, the liquid refrigerant medium is stored by the liquid storage tank 9 so as to buffer the volume change of the refrigerant medium after gas-liquid conversion, and keep the refrigerant medium to continuously flow in the evaporator 2 and the condenser 1. Preferably, the volume of the reservoir 9 is 250ML. If the defrosting structure of the water pan is also provided with the needle valve 8, the distance between the needle valve 8 and the liquid storage tank 9 is set to be 50-100 mm, and when the refrigerant medium needs to be filled, a user can fill the refrigerant through the needle valve 8.

Further, in the height direction, the evaporator 2 is located below the condenser 1, the gaseous refrigerant outlet 22 is located higher than the liquid refrigerant inlet 21, and the liquid storage tank 9 is communicated with the liquid refrigerant inlet 21. In this embodiment, the gaseous refrigerant absorbs heat from the evaporator 2 and evaporates, the density of the gaseous refrigerant is relatively low, and during gasification, a part of heat energy in the heat is converted into kinetic energy, and the gaseous refrigerant in the evaporator 2 moves to the refrigerant pipe 3 above and enters the condenser 1 to dissipate heat. After the gaseous refrigerant radiates heat through the condenser 1, the gaseous refrigerant is condensed into a liquid refrigerant, at the moment, the condensed refrigerant medium in the condenser 1 can flow back to the liquid storage tank 9 along the refrigerant pipeline 3 and flow back to the liquid refrigerant inlet 21 from the liquid storage tank 9 under the action of gravity, and the gasified refrigerant medium in the evaporator 2 can directly enter the refrigerant pipeline 3 from the gaseous refrigerant outlet 22 and flow into the condenser 1, so that a compressor is not required to push the refrigerant medium to flow, and the energy conservation and emission reduction are realized.

Preferably, the length of the condenser 1 is made to be greater than one third of the length of the water receiving tray 101, so that the contact area between the condenser 1 and the water receiving tray 101 is ensured to be more than one third of the bottom area of the water receiving tray 101, and the heating efficiency of the water receiving tray 101 is maintained. Meanwhile, the length limitation of the condenser 1 in the embodiment also improves the heating uniformity of the water receiving tray 101 of the condenser 1, reduces the icing area on the water receiving tray 101, and improves the defrosting effect of the defrosting structure of the water receiving tray.

As shown in fig. 5, the present utility model further provides a heat pump unit, which includes a machine body, a control main board 102, and a defrosting structure of the defrosting tray in any of the foregoing embodiments, where the machine body is provided with a defrosting tray 101 and the control main board 102, a condenser 1 of the defrosting structure of the defrosting tray is connected to the defrosting tray 101, and an evaporator 2 of the defrosting structure of the defrosting tray is connected to the control main board 102. The defrosting structure of the water receiving tray in this embodiment may have the same structure and achieve the same effect as the defrosting structure of the above embodiment, and will not be described in detail in this embodiment.

The heat pump unit does not need to be additionally provided with an electric heater for freezing prevention, and can defrost the defrosting water in the defrosting water tray 101 by utilizing the heat of the control main board 102, so that the heat pump unit is energy-saving and environment-friendly, the structural composition of the heat pump unit is simplified, and the operation reliability and the heating efficiency of the heat pump unit are improved. Preferably, the heat pump unit is a 15-piece three-phase variable-frequency heat pump unit.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are merely for convenience of description and to simplify the operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (10)

1. The utility model provides a water collector structure that prevents frostbite which characterized in that includes:

a water receiving tray (101) for receiving and discharging water of an outdoor heat exchanger of the heat pump unit;

the condenser (1) is arranged at one side of the water receiving disc (101) and is used for providing heat for the water receiving disc (101), the condenser (1) is provided with a gaseous refrigerant inlet (11), a liquid refrigerant outlet (12) and a first heat pipe channel (13), and the first heat pipe channel (13) is communicated between the gaseous refrigerant inlet (11) and the liquid refrigerant outlet (12);

an evaporator (2) for absorbing heat of the control main board (102), wherein the evaporator (2) is provided with a liquid refrigerant inlet (21), a gaseous refrigerant outlet (22) and a second heat pipe channel (23), the second heat pipe channel (23) is communicated between the liquid refrigerant inlet (21) and the gaseous refrigerant outlet (22), and the evaporator (2) is positioned below the condenser (1) in the height direction;

a refrigerant pipe (3) communicating the gaseous refrigerant inlet (11) with the gaseous refrigerant outlet (22), and communicating the liquid refrigerant outlet (12) with the liquid refrigerant inlet (21);

a refrigerant medium; when the heat pump unit operates, the refrigerant medium absorbs heat of the control main board (102) from the evaporator (2) and evaporates to form a gaseous refrigerant, the gaseous refrigerant flows to the condenser (1) to provide heat for the water receiving disc (101) and condenses into a liquid refrigerant, and the liquid refrigerant returns to the evaporator (2) under the action of gravity.

2. The defrosting structure for a water tray according to claim 1, further comprising:

a flow path distributor (5) which is arranged on a refrigerant pipeline (3) of the gaseous refrigerant inlet (11) and the gaseous refrigerant outlet (22);

the refrigerant pipeline (3) comprises a plurality of refrigerant branch pipelines (31), each refrigerant branch pipeline (31) is used for being connected with one condenser (1), the refrigerant branch pipelines (31) are arranged between the gaseous refrigerant inlet (11) and the flow path distributor (5), and the flow path distributor (5) distributes gaseous refrigerant of the refrigerant pipeline (3) to a plurality of refrigerant branch pipelines (31) and flows into a plurality of condensers (1).

3. The defrosting structure for a water tray according to claim 1, further comprising:

and the heat conduction layer (6) is arranged between the condenser (1) and the water receiving disc (101) and/or between the evaporator (2) and the control main board (102).

4. The defrosting structure for a water tray according to claim 1, further comprising:

the heat preservation layer (7) is arranged on one side of the condenser (1) away from the water receiving disc (101) and/or on one side of the evaporator (2) away from the control main board (102).

5. The defrosting structure for a water tray according to claim 1, further comprising:

the needle valve (8) is communicated with the refrigerant pipeline (3), and the needle valve (8) is used for opening and closing the refrigerant pipeline (3).

6. The defrosting structure of claim 1, characterized in that the surface of the condenser (1) is inclined with respect to the horizontal plane towards the liquid refrigerant outlet (12).

7. The defrosting structure for a water tray according to any one of claims 1 to 6, further comprising:

the liquid storage tank (9) is arranged on the refrigerant pipeline (3) between the liquid refrigerant outlet (12) and the liquid refrigerant inlet (21), and the liquid storage tank (9) is used for storing refrigerant media.

8. The defrosting structure of claim 7, wherein the lowest point of the condenser (1) is higher than the highest point of the evaporator (2) in the direction Gao Dufang, the gaseous refrigerant outlet (22) is located higher than the liquid refrigerant inlet (21), and the liquid storage tank (9) is communicated with the liquid refrigerant inlet (21).

9. The defrosting structure of one of claims 1 to 6, characterized in that the length of the condenser (1) is greater than one third of the length of the defrosting pan (101).

10. The heat pump unit is characterized by comprising a machine body, a control main board (102) and the defrosting structure of the defrosting tray of any one of claims 1 to 9, wherein the machine body is provided with the defrosting tray (101) and the control main board (102), a condenser (1) of the defrosting structure of the defrosting tray is connected to the defrosting tray (101), and an evaporator (2) of the defrosting structure of the defrosting tray is connected to the control main board (102).