CN219869234U - Shower water waste heat recovery system and air conditioner - Google Patents

Abstract

The utility model particularly relates to a shower water waste heat recovery system and an air conditioner, and belongs to the technical field of household appliances. The shower water waste heat recovery system provided by the utility model comprises: the shower water storage device comprises a water storage tank, an inner machine, a heat exchange piece and a drain floor drain, wherein the water storage tank is arranged below the drain floor drain, the water storage tank is communicated with the drain floor drain, shower water flows into the water storage tank after flowing through the drain floor drain, the heat exchange piece comprises a first heat exchange pipe, the water inlet end and the water outlet end of the first heat exchange pipe are respectively communicated with the water storage tank, the inner machine is provided with an air inlet, an air outlet and an exhaust fan, the first heat exchange pipe is arranged inside the inner machine, the exhaust fan is located between the first heat exchange pipe and the air outlet, and the exhaust fan blows air subjected to heat exchange with the first heat exchange pipe to the air outlet. The heat energy in the shower water is recovered and supplied to the room for heating, so that the living cost of people is reduced, and the heat supply efficiency of the room is improved.

Description

Shower water waste heat recovery system and air conditioner

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a shower water waste heat recovery system and an air conditioner.

Background

At present, bath water is directly discharged in the shower room for bath. The bath water still has residual heat energy, which causes heat waste. After the shower water can be collected, the shower water is supplied to the room to realize the heating of the shower room in winter.

In the prior art, a heat storage water tank is used for collecting shower water with heat, and the shower water in the heat storage water tank is directly conveyed into a room through a pipeline to supply heat.

In the mode of directly heating the room by the pipeline, the pipeline has low heat transfer efficiency, so that the influence on the indoor environment is very small, and the heating requirement of people cannot be met.

Disclosure of Invention

The utility model provides a shower water waste heat recovery system and an air conditioner, which are used for recovering and conveying waste heat in shower water indoors, so that the heat conveying efficiency of the air conditioner is improved, and the living cost of a user is reduced.

In a first aspect, a shower water waste heat recovery system includes: the device comprises a water storage tank, an inner machine, a heat exchange piece and a drainage floor drain;

the water storage tank is arranged below the drain floor drain, the water storage tank is communicated with the drain floor drain, and shower water flows into the water storage tank after flowing through the drain floor drain;

the heat exchange piece comprises a first heat exchange pipe, and a water inlet end and a water outlet end of the first heat exchange pipe are respectively communicated with the water storage tank;

the inner machine is provided with an air inlet, an air outlet and an exhaust fan, the first heat exchange tube is arranged in the inner machine, the exhaust fan is positioned between the first heat exchange tube and the air outlet, and the exhaust fan blows air subjected to heat exchange with the first heat exchange tube to the air outlet.

In the above optional technical scheme, the water storage tank further comprises a vertical pipe, wherein the vertical pipe is communicated with the water storage tank through a drain pipe, and the drain pipe is provided with an electric valve.

In the above-mentioned optional technical scheme, the water storage tank is communicated with the vertical pipe through an overflow pipe, and a pipe orifice of the overflow pipe is arranged at the upper part of the water storage tank.

In the above-mentioned optional technical scheme, the water inlet end of the first heat exchange tube is communicated with the water storage tank through a water inlet pipe, the water inlet pipe is provided with a circulating pump, and the circulating pump conveys shower water to the heat exchange member.

In the above alternative solution, the water inlet pipe is further provided with a check valve, which prevents back flow of the shower water.

In the above-mentioned alternative technical solution, the water inlet pipe is further provided with a filter, and the filter filters impurities in the shower water.

In the above optional technical solution, a water level gauge is further disposed in the water storage tank, and a distance from the bottom of the water level gauge to the bottom of the water storage tank is smaller than or equal to a distance from the drain pipe to the bottom of the water storage tank.

In the above-mentioned optional technical solution, the air inlet is disposed at the top of the inner machine, and the air outlet is disposed at the side of the inner machine.

In the above optional technical solution, the first heat exchange tubes are arranged in a serpentine shape.

In a second aspect, an air conditioner is provided, including an inner machine of the shower water waste heat recovery system according to the first aspect and an outer machine communicated with the inner machine, wherein an evaporator is further arranged inside the inner machine, and the heat exchange member is further provided with a second heat exchange tube intertwined with the first heat exchange tube;

the outlet of the evaporator is communicated with the inlet of the second heat exchange tube, and the outlet of the second heat exchange tube is communicated with the external machine.

As can be appreciated by those skilled in the art, the present utility model provides a shower water waste heat recovery system and an air conditioner, comprising: the shower bath water shower device comprises a water storage tank, an inner machine, a heat exchange piece and a drain floor drain, wherein the water storage tank is arranged below the drain floor drain, the water storage tank is communicated with the drain floor drain, and shower water flows into the water storage tank after flowing through the drain floor drain; the heat exchange piece comprises a first heat exchange pipe, and a water inlet pipe and a water outlet end of the first heat exchange pipe are respectively communicated with the water storage tank; the inner machine is provided with an air inlet, an air outlet and an exhaust fan, the heat exchange piece is arranged in the inner machine, the exhaust fan is positioned between the heat exchange piece and the air outlet, and the exhaust fan blows air subjected to heat exchange with the heat exchange piece to the air outlet. The heat energy in the shower water is recovered and supplied to the room for heating, so that the living cost of people is reduced, and the heat supply efficiency of the room is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a schematic diagram of the composition structure of a shower water waste heat recovery system provided by the utility model;

FIG. 2 is a schematic diagram of the arrangement of a drain floor drain of a shower water waste heat recovery system provided by the utility model;

FIG. 3 is a schematic diagram of a water storage tank of a shower water waste heat recovery system provided by the utility model;

fig. 4 is a schematic structural diagram of a heat exchange member of the shower water waste heat recovery system provided by the utility model;

fig. 5 is a flow chart of a shower water waste heat recovery system provided by the utility model.

Reference numerals:

1-a first position;

2-a second position;

100-recovery system;

110-a riser;

120-overflow pipe;

130-an electric valve;

140-a drain floor drain;

150-a drain pipe;

160-a water outlet pipe;

170-a water inlet pipe;

200-an internal machine;

210-heat exchange piece;

211-a first heat exchange tube;

212-a second heat exchange tube;

220-an exhaust fan;

230-an air outlet;

240-an air inlet;

300-a water storage tank;

400-check valve;

500-a filter;

600-circulating pump;

700-fluviograph.

Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, 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.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "inner", "outer", "upper", "bottom", "front", "rear", etc., if any, are based on those shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the prior art, a heat storage water tank is used for collecting shower water with heat, and the shower water in the heat storage water tank is directly conveyed into a room through a pipeline to supply heat. The method has low heat transfer efficiency of the pipeline, and can realize the recycling of the shower water, but has little influence on the indoor environment and can not meet the heating requirement of people.

And for winter heating, people are more prone to heating rooms by using a heating system of an air conditioner, but the air conditioner directly heats, so that more electric quantity is required to be consumed, and the living cost of people is increased.

Therefore, the utility model reduces the output power of the air conditioner by combining the heat in the recovered shower water with the heating system in the air conditioner, thereby reducing the electricity consumption of the air conditioner and controlling the cost.

The specific technical scheme is as follows: the shower water waste heat recovery system is combined with an air conditioner.

Fig. 1 is a schematic diagram of a composition structure of a shower water waste heat recovery system provided by the utility model, as shown in fig. 1. Comprising the following steps: reservoir 300, inner machine 200, heat exchange member 210, and drain 140.

The water storage tank 300 is arranged below the drain floor drain 140, the water storage tank 300 is communicated with the drain floor drain 140, and shower water flows into the water storage tank 300 after flowing through the drain floor drain 140.

The heat exchange member 210 includes a first heat exchange tube 211, and a water inlet end and a water outlet end of the first heat exchange tube 211 are respectively communicated with the water storage tank 300.

The inner machine 200 is provided with an air inlet 240, an air outlet 230 and an exhaust fan 220, the heat exchange piece 210 is arranged inside the inner machine 200, the exhaust fan 220 is positioned between the heat exchange piece 210 and the air outlet 230, and the exhaust fan 220 blows air subjected to heat exchange with the heat exchange piece 210 to the air outlet 230.

In this embodiment, the indoor unit 200 is used to heat the room separately, heat energy in the shower water is recovered, and heat in the shower water is supplied to the room through the indoor unit 200 to heat the room, so that living cost of people is reduced, and heat supply efficiency of the room is improved.

Since the present embodiment mainly uses the waste heat of the shower water for heating, the recovery system 100 of the present utility model is mainly disposed in a bathroom or a bathroom in a home, and may be disposed in a bathhouse for a special bath.

As shown in fig. 2, fig. 2 is a schematic view showing the arrangement of a drain floor drain of a shower water waste heat recovery system according to the present utility model, wherein a drain floor drain 140 is installed on the ground for collecting shower water in a shower room.

In the above-described solution, the water reservoir 300 is located below the drain floor drain 140. Because in the existing toilet, an overhead layer is arranged below the ground for waterproofing. The water reservoir 300 may be disposed within an overhead floor.

Wherein a pipe communicating between the drain floor drain 140 and the water reservoir 300 is located at the top of the water reservoir 300.

The water storage tank 300 is of a cylindrical or rectangular type, and the volume or water storage capacity of the water storage tank 300 can be adjusted according to actual demands or installation space.

The heat exchange member 210 is used for fixing the first heat exchange tube 211, and it should be noted that a plurality of through holes may be disposed on the heat exchange member 210, so as to facilitate air circulation and improve heat exchange efficiency between air and the first heat exchange tube 211.

Illustratively, the material of the first heat exchanging pipe 211 is carbon steel, low alloy steel, stainless steel, copper-nickel alloy, aluminum alloy, titanium, etc. having excellent heat transfer efficiency.

The overall shape of the inner machine 200 is, for example, a rectangular parallelepiped, wherein the air inlet 240 is used for delivering indoor air to the interior of the inner machine 200, and the air outlet 230 is used for delivering air to the interior of the inner machine 200. In order to achieve better heat transfer efficiency, the exhaust fan 220 is disposed between the first heat exchange tube 211 and the air outlet 230, and the waste heat of the shower water transferred by the first heat exchange tube 211 is transferred to the room through the exhaust fan 220 for the first time.

For example, the water storage tank 300 may be disposed outside the bathroom and communicated with the floor drain 140 of the bathroom through a pipe, and the circulation pump 600 may be disposed on the pipe between the water storage tank 300 and the floor drain 140 to pressurize, thereby installing the water storage tank 300 at any position, and thus the installation position of the water storage tank 300 is not limited by the present utility model.

In the above alternative solution, the device further comprises a stand pipe 110, the stand pipe 110 is communicated with the water storage tank 300 through a drain pipe 150, and the drain pipe 150 is provided with an electric valve 130.

Wherein the stand pipe 110 is used to discharge shower water or sewage. When the shower water waste heat recovery system 100 of the present utility model is closed, the electric valve 130 is opened and the shower water or sewage is discharged into the stand pipe 110 through the drain pipe 150. When the shower water waste heat recovery system of the present utility model is turned off, the electric valve 130 is turned off and the drain pipe 150 is not drained.

In the above alternative solution, the water tank 300 is further communicated with the vertical pipe 110 through the overflow pipe 120, and the orifice of the overflow pipe 120 is disposed at the upper portion of the water tank 300.

When the shower water waste heat recovery system 100 of the present utility model is operated, the drain pipe 150 cannot drain water due to the closed state of the electric valve 130, and when the water in the water storage tank 300 reaches the height of the overflow pipe 120, the overflow pipe 120 drains overflowed water into the vertical pipe 110, thereby ensuring the normal operation of the recovery system 100.

In other embodiments, the water outlet pipe 160 of the first heat exchange pipe 211 is directly connected to the stand pipe 110, and the shower water after absorbing the residual heat is directly discharged.

It should be noted that this approach requires ensuring that the shower water discharge of drain floor drain 140 is satisfactory for discharge of drain pipe 150, and this embodiment allows recovery system 100 to be located in a common shower with a large shower water discharge.

In the above-mentioned alternative solution, the water inlet end of the first heat exchange tube 211 is communicated with the water storage tank 300 through the water inlet tube 170, the water inlet tube 170 is provided with the circulation pump 600, and the circulation pump 600 delivers the shower water to the heat exchange member 210. The circulation pump 600 is provided to pressurize in order to avoid the position of the internal machine 200 being too high and the shower water cannot reach the position of the internal machine 200.

The circulation pump 600 is exemplified by a centrifugal pump or a volumetric pump.

In the above-mentioned alternative solution, the water inlet pipe 170 is further provided with a check valve 400, and the check valve 400 is used for preventing the shower water from flowing back, preventing the driving motor of the circulation pump 600 from reversing, and playing a role of safety isolation.

In the above alternative, the water inlet pipe 170 is further provided with a filter 500, and the filter 500 filters impurities in the shower water.

Wherein the filter 500, the check valve 400 and the circulation pump 600 are sequentially arranged on the water inlet pipe 170, wherein the filter 500 is located upstream, mainly preventing impurities from entering the circulation pump 600 or the check valve 400.

In the above-mentioned alternative solution, the water tank 300 is further provided with a water level gauge 700, and the distance from the bottom of the water level gauge 700 to the bottom of the water tank 300 is less than or equal to the distance from the drain pipe 150 to the bottom of the water tank 300.

Referring to fig. 3, fig. 3 is a schematic diagram of a water storage tank of a shower water waste heat recovery system according to the present utility model. In this embodiment, the water outlet pipe 160, the overflow pipe 120 and the water outlet pipe 150 are distributed in the water storage tank 300, the water outlet pipe 160 and the overflow pipe 120 are located at the same height, the water outlet pipe 150 is located at the bottom of the water storage tank 300, wherein the water outlet pipe 150 located outside the water storage tank 300 is divided into two pipelines, one of which is connected with the vertical pipe 110, and the other one of which is connected with the water inlet end of the first heat exchange tube 211 on the heat exchange member 210 as the water inlet pipe 170.

The water level gauge 700 is used for detecting the water level in the water storage tank 300, and the water level gauge 700 can be a radar water level gauge 700, a pressure water level gauge 700 or a floating ball water level gauge 700. The first sensing node in the water level gauge 700 is located at the bottom of the water reservoir 300, the first sensing node is at the same height as the drain pipe 150, the second sensing node is located at the top of the water reservoir 300, and the second sensing node is at the same height as the overflow pipe 120. The two sensing nodes are respectively used for monitoring whether the water level is in an overflow state or a shower water draining state.

Wherein, when the sensing nodes 1 and 2 are both in the trigger state, the water storage tank 300 is in the overflow state, and the shower water flows out from the overflow pipe 120.

When sensing node 2 is not activated and node 1 is activated, the water reservoir 300 is in a lowered water level condition, at which time the drain pipe 150 is draining shower water to the riser pipe 110.

When both sensing nodes 1 and 2 are in the non-activated state, the water in the water reservoir 300 is drained, ending the recovery system 100 operation.

In the above alternative solution, the air inlet 240 is disposed at the top of the inner machine 200, and the air outlet 230 is disposed on the side wall of the inner machine 200.

For example, the air intake 240 may be disposed on a side wall or a bottom of the internal machine 200.

In the above-mentioned alternative solution, the first heat exchange tubes 211 are arranged in a serpentine shape, and the heat exchange efficiency is improved by increasing the contact area of the first heat exchange tubes 211.

In the separate recovery system 100, the internal machine 200 is installed in a room, when a person bathes, the circulation pump 600 is opened and the electric valve 130 is closed, shower water enters the water storage tank 300 through the drain floor drain 140, shower water in the water storage tank 300 enters the first heat exchange tube 211 through the water inlet tube 170, at this time, the exhaust fan 220 is turned on, shower water waste heat in the first heat exchange tube 211 enters the room from the air outlet 230 under the action of the exhaust fan 220, and shower water losing waste heat enters the water outlet tube 160 and flows back into the water storage tank 300. When the water in the water reservoir 300 is full, it flows from the overflow pipe 120 into the standpipe 110 and is discharged.

In the above-described embodiments, the water tank 300 of the recovery system 100 is connected to the sink of the kitchen through a pipe, and the hot water of the sink is recovered.

The utility model also provides an air conditioner, which combines the air conditioner with the shower water waste heat recovery system 100, and comprises an inner machine 200 of the shower water waste heat recovery system 100 and an outer machine communicated with the inner machine 200, wherein an evaporator is further arranged in the inner machine 200, and a heat exchange piece 210 is further provided with a second heat exchange tube 212 which is mutually wound with the first heat exchange tube 211.

As shown in fig. 4, fig. 4 is a schematic structural diagram of a heat exchange member of a shower water waste heat recovery system provided by the utility model. The outlet of the evaporator is communicated with the inlet of the second heat exchange tube 212, and the outlet of the second heat exchange tube 212 is communicated with an external machine.

The shower water with waste heat flows in the first heat exchange tube 211, the refrigerant flows in the second heat exchange tube 212, and heat in the shower water in the first heat exchange tube 211 is transferred to the refrigerant through heat exchange, so that the heating efficiency of the refrigerant is improved.

For example, two first heat exchange tubes 211 are disposed in the inner machine 200, one of which is separately provided with an exhaust fan 220, and waste heat in the first heat exchange tubes 211 is directly blown into a room through the exhaust fan 220 to raise the temperature. The other first heat exchange tube 211 exchanges heat with the second heat exchange tube 212 at the outlet of the evaporator.

For the two first heat exchange tubes 211, two separate water inlet and outlet tubes may be respectively connected to each first heat exchange tube 211, or one water inlet and outlet tube may be directly connected to the two first heat exchange tubes 211 in series.

It should be noted that in the solution in which two first heat exchange tubes 211 are directly connected in series, the first heat exchange tube 211 located upstream exchanges heat with the second heat exchange tube 212, and the first heat exchange tube 211 located downstream is connected with the exhaust fan 220.

In the heating process of the air conditioner, after the evaporator releases heat, the temperature of the refrigerant at the outlet of the evaporator is reduced, and the temperature of the refrigerant entering the second heat exchange tube 212 is increased under the heat exchange action of the first heat exchange tube 211, so that the output power of the compressor in the external machine is reduced, and the living cost is reduced.

In this embodiment, the heat of the shower water in the first heat exchange pipe 211, which is not transferred to the second heat exchange pipe 212, may be directly discharged into the room.

For example, the indoor unit 200 in the air conditioner may be a hanging type or a standing type.

As shown in fig. 5, fig. 5 is a flowchart of a shower water waste heat recovery system and an air conditioner provided by the utility model. Referring to fig. 3 and 5, reference numerals 1 and 2 in fig. 3 denote positions of the water level of the water storage tank 300, which are denoted as a first position 1 and a second position 2, the first position 1 is located at the bottom of the water storage tank 300, and when the water level is lower than the first position 1, it means that the water amount in the water storage tank 300 is insufficient to perform the waste heat recovery cycle, i.e., the cycle is stopped, and the recovery system 100 is turned off. The second position 2 is located at the middle or top of the water storage tank 300, and when the water level is higher than the second position 2, the water in the water storage tank 300 is enough to perform the waste heat recovery cycle, namely, the cycle is started, and the recovery system 100 is turned on. It should be noted that the water level between the first position 1 and the second position 2 does not affect the operation of the recovery system 100 during operation of the recovery system 100; the water level between the first position 1 and the second position 2 does not affect the closed state of the recovery system 100 when the recovery system 100 is closed.

The shower water waste heat recovery system 100 and the air conditioner work flow of the utility model are as follows:

1. starting an air conditioner;

2. closing the electromagnetic valve;

3. whether the water level of the water storage tank 300 is higher than the second position 2 is judged by the water level gauge 700, and if not, judgment is made after waiting for one minute. If yes, the circulation pump 600 and the exhaust fan 220 are turned on;

4. after the shower is finished, the electromagnetic valve is opened, whether the water level of the water storage tank 300 is lower than the first position 1 is judged, and if not, the air conditioner continues to operate. If so, the circulation pump 600 and the exhaust fan 220 are turned off.

In the utility model, the recovery system 100 is adopted to directly supply heat or the recovery system is combined with the air conditioner to supply heat, so that the waste heat in the shower water is fully utilized, the living cost of people is greatly reduced, and the utilization efficiency of resources is improved.

While the present utility model has been described with reference to the preferred embodiments shown in the drawings, it will be readily understood by those skilled in the art that the scope of the utility model is not limited to those specific embodiments, and the above examples are only for illustrating the technical solution of the utility model, not for limiting it; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A shower water waste heat recovery system, comprising: the device comprises a water storage tank, an inner machine, a heat exchange piece and a drainage floor drain;

the water storage tank is arranged below the drain floor drain, the water storage tank is communicated with the drain floor drain, and shower water flows into the water storage tank after flowing through the drain floor drain;

the heat exchange piece comprises a first heat exchange pipe, and a water inlet end and a water outlet end of the first heat exchange pipe are respectively communicated with the water storage tank;

the inner machine is provided with an air inlet, an air outlet and an exhaust fan, the first heat exchange tube is arranged in the inner machine, the exhaust fan is positioned between the first heat exchange tube and the air outlet, and the exhaust fan blows air subjected to heat exchange with the first heat exchange tube to the air outlet.

2. The shower water waste heat recovery system of claim 1, further comprising a riser pipe in communication with the water reservoir through a drain pipe, the drain pipe being provided with an electrically operated valve.

3. The shower water waste heat recovery system of claim 2, wherein the water storage tank is further communicated with the vertical pipe through an overflow pipe, and a pipe orifice of the overflow pipe is arranged at the upper part of the water storage tank.

4. The shower water waste heat recovery system of claim 1, wherein the water inlet end of the first heat exchange tube is communicated with the water storage tank through a water inlet tube, the water inlet tube is provided with a circulating pump, and the circulating pump conveys shower water to the first heat exchange tube.

5. The shower water waste heat recovery system of claim 4, wherein the water inlet pipe is further provided with a check valve that prevents back flow of the shower water.

6. The shower water waste heat recovery system of claim 5, wherein the water inlet pipe is further provided with a filter that filters impurities in the shower water.

7. The shower water waste heat recovery system of claim 6, wherein a water level gauge is further disposed within the water reservoir, and wherein a distance from the bottom of the water level gauge to the bottom of the water reservoir is less than or equal to a distance from the drain pipe to the bottom of the water reservoir.

8. The shower water waste heat recovery system of claim 1, wherein the air inlet is provided at a top of the inner machine and the air outlet is provided at a side of the inner machine.

9. The system of any one of claims 1-8, wherein the first heat exchange tubes are arranged in a serpentine pattern.

10. An air conditioner, characterized by comprising an inner machine of the shower water waste heat recovery system as claimed in any one of claims 1-9 and an outer machine communicated with the inner machine, wherein an evaporator is further arranged inside the inner machine, and the heat exchange piece further comprises a second heat exchange tube intertwined with the first heat exchange tube;

the outlet of the evaporator is communicated with the inlet of the second heat exchange tube, and the outlet of the second heat exchange tube is communicated with the external machine.