CN118189380B - Heat pump indoor unit - Google Patents

Abstract

The present application relates to a heat pump indoor unit, which belongs to the technical field of air conditioning, and includes an indoor unit body; a main delivery pipe, which is arranged at the output end of the indoor unit body; a three-way valve body, which is connected to the bottom of the main delivery pipe; a hot water pipe, which is connected to one output end of the three-way valve body, and a hot water storage tank is arranged at one end of the hot water pipe away from the three-way valve body; a supply pipe, which is connected to the other output end of the three-way valve body, and one end of the supply pipe away from the three-way valve body is connected to an air conditioning and ventilation system. In the present application, in winter, the indoor unit body outputs hot water, operates the three-way valve body, and delivers hot water to the hot water storage tank through the hot water pipe. The hot water in the hot water storage tank can be used by people for daily use, so that the supply pipe is connected to the air conditioning and ventilation system, thereby providing heat to the room through the air conditioning and ventilation system, which is convenient for heating the room.

Description

Heat pump indoor unit

Technical Field

The present application belongs to the technical field of air conditioners, and in particular to a heat pump indoor unit.

Background Art

Plate heat exchangers are increasingly used in air conditioning products due to their compactness and high efficiency. In recent years, air source heat pump technology has been widely developed.

In winter, the temperature is generally low, and people need to use hot water and increase the temperature indoors. At this time, indoor hot water is generally provided by a water heater, and indoor heating is generally completed by an air conditioning system. In summer, the temperature is generally high, and people need to cool down indoors. Indoor cooling is completed by an air conditioning system.

With respect to the above-mentioned related technologies, the inventor believes that in winter, water heaters and air-conditioning systems are needed to meet people's usage needs, which requires more energy and causes energy waste.

Summary of the invention

In order to improve the efficiency of energy use, the present application provides a heat pump indoor unit.

This application provides a heat pump indoor unit, which adopts the following technical solution:

Heat pump indoor unit, including

Indoor unit body;

The main delivery pipe is arranged at the output end of the indoor unit body;

A three-way valve body connected to the bottom of the main delivery pipe;

A hot water pipe is connected to an output end of the three-way valve body, and a hot water storage tank is arranged at one end of the hot water pipe away from the three-way valve body;

The supply pipe is communicated with the other output end of the three-way valve body, and one end of the supply pipe away from the three-way valve body is connected to the air conditioning and ventilation system.

By adopting the above technical scheme, when it is summer, the indoor unit body outputs cold water, operates the three-way valve body, connects the main delivery pipe with the supply pipe, disconnects the main delivery pipe with the hot water pipe, and connects the supply pipe with the air-conditioning and ventilation system, thereby providing cold water to the air-conditioning and ventilation system through the supply pipe, which is convenient for the air-conditioning and ventilation system to cool down the room; when it is winter, the indoor unit body outputs hot water, operates the three-way valve body, connects the main delivery pipe with the hot water pipe, connects the main delivery pipe with the supply pipe, and transports hot water to the hot water storage tank through the hot water pipe. The hot water in the hot water storage tank can be used by people for daily use, and connects the supply pipe with the air-conditioning and ventilation system, thereby providing heat to the room through the air-conditioning and ventilation system, which is convenient for heating up the room.

Optionally, the three-way valve body includes a valve core housing, a maintenance housing and a closed housing respectively connected to the two ends of the valve core housing, a three-way valve core movably connected in the valve core housing, a lower external expansion pipe arranged at the other end of the maintenance housing and the closed housing, an input pipe arranged at the input end of the valve core housing, and an upper external expansion pipe arranged at the end of the input pipe away from the valve core housing, the main delivery pipe is connected to the upper external expansion pipe, and the two lower external expansion pipes are respectively connected to the hot water pipe and the supply pipe.

By adopting the above technical solution, the three-way valve core is rotated by the valve stem to put the three-way valve core in different states, which is convenient for adjusting the connection or sealing between the input pipe, the maintenance shell and the closed shell.

Optionally, the end of the maintenance shell away from the valve core shell is opened, and a maintenance plate is detachably connected to the opening of the maintenance shell, one end of the maintenance plate is provided with an outer sealing circular plate, the other end of the outer sealing circular plate is provided with a connecting strip, the end of the connecting strip away from the outer sealing circular plate is provided with an inner sealing circular plate, and the ends of the inner sealing circular plate and the closed shell that are close to each other are provided with a valve core sealing ring that cooperates with the three-way valve core.

By adopting the above technical solution, when the three-way valve body needs to be repaired, the maintenance plate is removed to facilitate the repair or replacement of the components inside the three-way valve body; the provision of two valve core sealing rings can improve the sealing between the three-way valve core and the inner sealing circular plate and the closed shell respectively.

Optionally, pipe sealing rings are provided on the main delivery pipe, hot water pipe and supply pipe.

By adopting the above technical solution, the sealing performance between the main delivery pipe and the upper external expansion pipe can be improved, and the sealing performance between the two lower external expansion pipes and the hot water pipe and the supply pipe can be improved.

Optionally, a connecting mechanism is provided between the upper outward expansion pipe and the main delivery pipe, and between the two lower outward expansion pipes and the hot water pipe and the supply pipe respectively, and the connecting mechanism includes a U-shaped pin, which passes through the upper outward expansion pipe and the two lower outward expansion pipes, and the ends of the main delivery pipe, the hot water pipe and the supply pipe are provided with pin grooves for the U-shaped pin to pass through.

By adopting the above technical solution, a detachable connection can be achieved between the upper external expansion pipe and the main delivery pipe, and between the two lower external expansion pipes and the hot water pipe and the supply pipe, respectively, so that the three-way valve body can be easily repaired and replaced.

Optionally, the connecting mechanism also includes a limiting assembly for limiting the two ends of the U-shaped pin, the limiting assembly includes a mounting seat arranged on the upper external expansion tube and the lower external expansion tube, two sliders slidably arranged on the mounting seat, a limiting block arranged at one end of the slider, and a first elastic member arranged between the two sliders, the limiting block is provided with an insertion interface for the end of the U-shaped pin to be plugged in, the end of the U-shaped pin is arranged as a slope, and the slope of the U-shaped pin faces the side away from the first elastic member.

By adopting the above technical solution, before the end of the U-shaped pin is inserted into the plug-in interface, under the action of the first elastic member, the two sliders will approach each other by a short distance, and the distance between the two limit blocks will be smaller than the distance between the two ends of the U-shaped pin, so that the two limit blocks are separated from each other, and the first elastic member is stretched until the end of the U-shaped pin is inserted into the plug-in interface, so that the U-shaped pin is not easily separated from the upper outer expansion tube and the lower outer expansion tube.

Optionally, a special-shaped block is provided at one end of the two sliding blocks close to each other, and the mounting seat is slidably connected with an unlocking block located between the two special-shaped blocks, and the unlocking block is used to push the two special-shaped blocks away from each other.

By adopting the above technical solution, when it is necessary to separate the U-shaped latch and the limit block, first press the unlocking block. With the cooperation of the inclined surface, the unlocking block can push the two special-shaped blocks away from each other, and the limit block no longer squeezes the end of the U-shaped latch, thereby facilitating the operation of the U-shaped latch.

Optionally, the connecting mechanism also includes a locking assembly for locking the bent portion of the U-shaped pin, the locking assembly including a fixed seat arranged on the upper outward expansion tube and the lower outward expansion tube, a vertical rod slidably passed through the fixed seat, a U-shaped locking piece arranged at one end of the vertical rod and used to lock the U-shaped pin, and a second elastic piece arranged between the fixed seat and the U-shaped locking piece.

By adopting the above technical solution, under the action of the second elastic member, the U-shaped locking member can move, so that the U-shaped locking member locks the bent portion of the U-shaped latch, making it difficult for the U-shaped latch to separate from the upper outer expansion tube and the lower outer expansion tube. Moreover, under the action of the second elastic member, the U-shaped locking member can further increase the friction between the U-shaped latch and the upper outer expansion tube and the lower outer expansion tube respectively.

Optionally, the locking assembly also includes a push-pull plate arranged at one end of the vertical rod away from the U-shaped locking piece and a limiting component for limiting the push-pull plate, the limiting component includes an installation groove opened on the upper outward expansion tube and the lower outward expansion tube, a third elastic member arranged in the installation groove, and an inclined block slidably connected to the installation groove, and the inclined surface of the inclined block faces the vertical rod.

By adopting the above technical solution, the push-pull plate is pulled in a direction away from the U-shaped latch, so that the push-pull plate pushes the inclined block, so that the push-pull plate is located on the side of the inclined block away from the U-shaped latch. Under the action of the third elastic member, the inclined block extends out of the installation groove and restricts the push-pull plate, thereby facilitating the operation of the U-shaped latch.

Optionally, the bent portion of the U-shaped latch is covered with an anti-slip sleeve.

By adopting the above technical solution, the anti-slip sleeve can increase the friction coefficient between the person and the U-shaped latch, making it easier to operate the U-shaped latch.

In summary, the present application includes at least one of the following beneficial technical effects:

1. When the three-way valve body needs to be repaired, remove the maintenance plate to facilitate the repair or replacement of the components inside the three-way valve body;

2. Before the end of the U-shaped plug is inserted into the plug-in interface, under the action of the first elastic member, the two sliders will approach each other by a short distance, and the distance between the two limit blocks will be smaller than the distance between the two ends of the U-shaped plug, so that the two limit blocks will move away from each other, and the first elastic member will be stretched until the end of the U-shaped plug is inserted into the plug-in interface, so that the U-shaped plug is not likely to be separated from the upper outer expansion tube and the lower outer expansion tube;

3. Under the action of the second elastic member, the U-shaped locking member can move, so that the U-shaped locking member locks the bent portion of the U-shaped latch, making it difficult for the U-shaped latch to separate from the upper outer expansion tube and the lower outer expansion tube. Moreover, under the action of the second elastic member, the U-shaped locking member can further increase the friction between the U-shaped latch and the upper outer expansion tube and the lower outer expansion tube.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a heat pump indoor unit;

FIG2 is a schematic diagram of a three-way valve body of a heat pump indoor unit;

FIG3 is a schematic diagram of the internal structure of a three-way valve body of a heat pump indoor unit;

FIG4 is a schematic diagram of a valve core housing, a maintenance housing and a repair housing of a heat pump indoor unit;

FIG5 is a bottom view of the three-way valve body of the heat pump indoor unit;

FIG6 is a schematic diagram of a U-shaped latch and a limit stop assembly of a heat pump indoor unit;

FIG. 7 is a partial enlarged schematic diagram of portion A in FIG. 3 .

Explanation of reference numerals: 1. Indoor unit body; 2. Main delivery pipe; 3. Three-way valve body; 4. Hot water pipe; 5. Supply pipe; 6. Casing; 7. Valve core housing; 8. Maintenance housing; 9. Closed housing; 10. Three-way valve core; 11. Lower expansion pipe; 12. Input pipe; 13. Upper expansion pipe; 14. Valve stem; 15. Maintenance plate; 16. Bolt; 17. Nut; 18. Outer sealing disc; 19. Connecting strip; 20. Inner sealing disc; 21. Valve core sealing ring; 22. Inner sealing ring; 23. Outer sealing ring; 24. Detection tube; 25. Detection frame; 26. Detection slot; 27, pressure detector; 28, detection seal; 29, pipeline seal; 30, U-shaped latch; 31, latch slot; 32, limit assembly; 33, mounting seat; 34, slider; 35, limit block; 36, first elastic member; 37, slide slot; 38, plug interface; 39, special-shaped block; 40, unlocking block; 41, locking assembly; 42, fixing seat; 43, vertical rod; 44, U-shaped locking member; 45, second elastic member; 46, anti-slip sleeve; 47, push-pull plate; 48, limit component; 49, mounting slot; 50, third elastic member; 51, oblique block.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-7.

The embodiment of the present application discloses a heat pump indoor unit. Referring to Figures 1 and 2, the heat pump indoor unit includes an indoor unit body 1, a main delivery pipe 2, a three-way valve body 3, a hot water pipe 4 and a supply pipe 5. The indoor unit body 1 is installed inside a casing 6. The indoor unit body 1 is a prior art, and its output end can output hot water or cold water. The main delivery pipe 2 is fixedly connected to the output end of the indoor unit body 1, and the bottom end of the main delivery pipe 2 is connected to the input end of the three-way valve body 3. The hot water pipe 4 and the supply pipe 5 are respectively connected to the two output ends of the three-way valve body 3. The end of the hot water pipe 4 away from the three-way valve body 3 is connected to a hot water storage tank, and the end of the supply pipe 5 away from the three-way valve body 3 is connected to an air conditioning ventilation system.

In summer, the temperature is generally high, and the indoor temperature needs to be lowered. At this time, the indoor unit body 1 outputs cold water, operates the three-way valve body 3, connects the main delivery pipe 2 with the supply pipe 5, disconnects the main delivery pipe 2 from the hot water pipe 4, and connects the supply pipe 5 to the air conditioning and ventilation system, thereby providing cold water to the air conditioning and ventilation system through the supply pipe 5, which is convenient for the air conditioning and ventilation system to cool the indoor temperature; in winter, the temperature is generally low, and the indoor temperature needs to be raised. At this time, the indoor unit body 1 outputs hot water, operates the three-way valve body 3, connects the main delivery pipe 2 with the hot water pipe 4, connects the main delivery pipe 2 with the supply pipe 5, and transports hot water to the hot water storage tank through the hot water pipe 4. The hot water in the hot water storage tank can be used by people for daily use, and connects the supply pipe 5 to the air conditioning and ventilation system, thereby providing heat to the indoor temperature through the air conditioning and ventilation system, which is convenient for raising the indoor temperature. It should be noted that a heat exchange pipe is arranged near the supply pipe 5 to the air conditioning and ventilation system, and the wind blown out by the air conditioning and ventilation system blows on the surface of the heat exchange pipe, thereby facilitating heat exchange inside and outside the heat exchange pipe, thereby improving the energy efficiency.

Furthermore, after the hot water in the hot water storage tank is used, the hot water loses heat to form normal temperature water, which is transported back to the indoor unit body 1 through a pipeline, and before that, impurities in the normal temperature water are filtered.

3 and 4, preferably, the three-way valve body 3 includes a valve core housing 7, a maintenance housing 8, a closed housing 9, a three-way valve core 10, a lower external expansion pipe 11, an input pipe 12 and an upper external expansion pipe 13. The valve core housing 7 is hollow and has three openings, namely, a top opening, a left opening and a right opening. The input pipe 12 is integrally connected to the top opening of the valve core housing 7, and the upper external expansion pipe 13 is integrally connected to one end of the input pipe 12 away from the valve core housing 7. The main delivery pipe 2 is away from one end of the indoor unit body 1. The end is connected with the upper external expansion pipe 13, the maintenance shell 8 is integrally connected to the left opening of the valve core shell 7, the closed shell 9 is integrally connected to the right opening of the valve core shell 7, the three-way valve core 10 is movably installed inside the valve core shell 7, and a valve stem 14 is fixed to the outside of the three-way valve core 10, and the valve stem 14 extends out of the valve core shell 7. Two lower external expansion pipes 11 are provided, and the two lower external expansion pipes 11 are respectively fixedly connected to the bottom of the maintenance shell 8 and the closed shell 9, and the two lower external expansion pipes 11 are respectively connected to the hot water pipe 4 and the supply pipe 5.

The three-way valve core 10 is rotated by the valve stem 14 to put the three-way valve core 10 in different states, so as to facilitate the adjustment of the connection or blockage among the input pipe 12, the maintenance housing 8 and the closed housing 9.

Furthermore, the end of the maintenance shell 8 away from the valve core shell 7 is opened, and a maintenance plate 15 is detachably connected to the opening of the maintenance shell 8. The maintenance plate 15 and the maintenance shell 8 are detachably connected by bolts 16 and nuts 17. An outer sealing circular plate 18 is fixed to the end of the maintenance plate 15 close to the maintenance shell 8, and a plurality of connecting strips 19 are fixed to the end of the outer sealing circular plate 18 away from the maintenance plate 15. An inner sealing circular plate 20 is fixed to the end of the connecting strip 19 away from the outer sealing circular plate 18. The middle part of the inner sealing circular plate 20 is opened, and valve core sealing rings 21 are installed at the ends of the inner sealing circular plate 20 and the closed shell 9 close to each other, and the two valve core sealing rings 21 are both sealed with the outer side of the three-way valve core 10.

The provision of two valve core sealing rings 21 can improve the sealing between the three-way valve core 10 and the inner sealing circular plate 20 and the closed shell 9 respectively; when the three-way valve body 3 needs to be repaired, first remove the bolts 16 and nuts 17, and pull the maintenance plate 15 outward to facilitate the maintenance or replacement of the components in the three-way valve body 3.

Preferably, an inner sealing ring 22 is sleeved on the outer side of the inner sealing circular plate 20, and an outer sealing ring 23 is sleeved on the outer side of the outer sealing circular plate 18, and both the inner sealing ring 22 and the outer sealing ring 23 are sealed with the inner side of the maintenance housing 8. Such an arrangement can improve the sealing performance between the maintenance housing 8 and the inner sealing circular plate 20 and the outer sealing circular plate 18, respectively.

Furthermore, a detection tube 24 is fixedly connected to the middle of the input tube 12, and a detection frame 25 is fixed to one end of the detection tube 24 away from the input tube 12. The detection frame 25 is provided with a detection groove 26 connected to the inside of the detection tube 24, and a pressure detector 27 is installed in the detection groove 26. The detection end of the pressure detector 27 extends into the input tube 12 through the detection tube 24, so that the pressure in the input tube 12 can be detected. In addition, a sealing groove is provided on the outer side of the shell of the pressure detector 27, and a detection sealing ring 28 is provided on the shell of the pressure detector 27 through the sealing groove, and the detection sealing ring 28 is sealed with the detection tube 24.

Preferably, the outer sides of the main delivery pipe 2, the hot water pipe 4 and the supply pipe 5 are all sleeved with pipe sealing rings 29, and the pipe sealing rings 29 are respectively sealed with the upper outer expansion pipe 13 and the two lower outer expansion pipes 11. In this way, the sealing performance between the main delivery pipe 2 and the upper outer expansion pipe 13 can be improved, and the sealing performance between the two lower outer expansion pipes 11 and the hot water pipe 4 and the supply pipe 5 can be improved.

3 , since the indoor unit body 1 will generate a small amplitude vibration when working, and the water flow in the pipeline is likely to cause pipeline vibration, a connecting mechanism is installed between the upper external expansion pipe 13 and the main delivery pipe 2, and between the two lower external expansion pipes 11 and the hot water pipe 4 and the supply pipe 5, respectively. The connecting mechanism includes a U-shaped pin 30, and the U-shaped pin 30 passes through the upper external expansion pipe 13 and the two lower external expansion pipes 11. One end of the main delivery pipe 2 close to the upper external expansion pipe 13, one end of the hot water pipe 4 close to the lower external expansion pipe 11, and one end of the supply pipe 5 close to the lower external expansion pipe 11 are all provided with a pin groove 31 for the U-shaped pin 30 to pass through.

The two ends of the U-shaped latch 30 penetrate from one side of the upper external expansion tube 13 and the two lower external expansion tubes 11, and pass through the latch groove 31, and then the two ends of the U-shaped latch 30 penetrate from the other side of the upper external expansion tube 13 and the two lower external expansion tubes 11, thereby realizing a detachable connection between the upper external expansion tube 13 and the main conveying pipe 2, and between the two lower external expansion tubes 11 and the hot water pipe 4 and the supply pipe 5 respectively.

5 and 6 , preferably, the connection mechanism further includes a limiting assembly 32 , and the limiting assembly 32 can limit the two ends of the U-shaped latch 30 . The limiting assembly 32 includes a mounting seat 33, two sliders 34, a limiting block 35 and a first elastic member 36. The mounting seat 33 is fixed on the upper outer expansion tube 13 and the lower outer expansion tube 11. The mounting seat 33 is located on the outer side of the upper outer expansion tube 13 and the lower outer expansion tube 11 and close to the two ends of the U-shaped plug 30. A sliding groove 37 is provided on the side of the mounting seat 33 close to the U-shaped plug 30. The length of the sliding groove 37 is greater than the distance between the two ends of the U-shaped plug 30. The two sliders 34 are both slidably connected inside the sliding groove 37. The first elastic member 36 is fixed between the two sliders 34. The limiting block 35 is fixed to the end of the slider 34 away from the sliding groove 37. The limiting block 35 is provided at the end close to the U-shaped plug 30 with an insertion port 38 for the end of the U-shaped plug 30 to be plugged in. The end of the U-shaped plug 30 is set to an inclined surface, and the inclined surface of the U-shaped plug 30 faces the side away from the first elastic member 36. In this embodiment, the first elastic member 36 is a spring, the slider 34 is a dovetail block, and the slide groove 37 is a dovetail groove.

Before the end of the U-shaped latch 30 is inserted into the insertion port 38, under the action of the first elastic member 36, the two sliders 34 will approach each other for a short distance, and the distance between the two limit blocks 35 will be smaller than the distance between the two ends of the U-shaped latch 30. After the U-shaped latch 30 is gradually inserted, since the end of the U-shaped latch 30 is set as an inclined surface, the two limit blocks 35 are moved away from each other under the guidance of the inclined surface, and the first elastic member 36 is stretched until the end of the U-shaped latch 30 is inserted into the insertion port 38. It should be noted that after the end of the U-shaped latch 30 is inserted into the insertion port 38, since the first elastic member 36 is in a stretched state, there will be a band The two limit blocks 35 tend to move closer to each other, so as to increase the positive pressure between the position near the end of the outer side of the U-shaped latch 30 and the plug interface 38, thereby increasing the friction between the two, so as to reduce the phenomenon that the U-shaped latch 30 is not easy to be separated from the upper outer expansion tube 13 and the lower outer expansion tube 11 due to the vibration of the pipeline; and after the limit blocks 35 squeeze the ends of the U-shaped latch 30, the friction between the U-shaped latch 30 and the upper outer expansion tube 13 and the lower outer expansion tube 11 can be increased. In addition, the pressing forces applied by the two limit blocks 35 to the U-shaped latch 30 are opposite, and the vibration generated at a certain moment when the pipeline vibrates cannot vibrate the two limit blocks 35 open at the same time.

Furthermore, a special-shaped block 39 is fixed at one end of the two sliders 34 that are close to each other. The special-shaped block 39 is trapezoidal in shape, and the end of the special-shaped block 39 away from the slider 34 is an inclined surface. An unlocking block 40 is slidably connected in the mounting seat 33. The unlocking block 40 is located between the two special-shaped blocks 39, and the bottom of the unlocking block 40 is provided with two inclined surfaces facing the special-shaped block 39.

When the U-shaped latch 30 needs to be separated from the limit block 35, the unlocking block 40 is pressed first. With the cooperation of the inclined surface, the unlocking block 40 can push the two special-shaped blocks 39 away from each other, and the limit block 35 no longer squeezes the end of the U-shaped latch 30, which is convenient for operating the U-shaped latch 30. In addition, since the U-shaped latch 30 is inserted into the upper outer expansion tube 13 and the lower outer expansion tube 11 for a long time, it is easy for the U-shaped latch 30 to be corroded and oxidized, and it will be difficult to pull out the U-shaped latch 30. At this time, the unlocking block 40 is pressed, and the first elastic member 36 is in a stretched state, and the unlocking block 40 is repeatedly pressed, so that the U-shaped latch 30 can be loosened, which is convenient for the subsequent pulling out of the U-shaped latch 30.

Referring to Fig. 7, preferably, the connection mechanism further includes a locking assembly 41, which can lock the bent portion of the U-shaped latch 30. The locking assembly 41 includes a fixed seat 42, a vertical rod 43, a U-shaped locking member 44 and a second elastic member 45. The fixed seat 42 is fixed on the upper outer expansion tube 13 and the lower outer expansion tube 11 and is away from the side of the mounting seat 33. The vertical rod 43 slides through the fixed seat 42. The length direction of the vertical rod 43 is parallel to the length direction of the upper outer expansion tube 13 and the lower outer expansion tube 11. The U-shaped locking member 44 is fixed to one end of the vertical rod 43 close to the U-shaped latch 30. The second elastic member 45 is fixed between the fixed seat 42 and the U-shaped locking member 44. In addition, the bent portion of the U-shaped latch 30 is sleeved with an anti-slip sleeve 46. In this embodiment, the second elastic member 45 is a spring.

When the U-shaped latch 30 is fully inserted into the upper outer expansion tube 13 and the lower outer expansion tube 11, under the action of the second elastic member 45, the U-shaped locking member 44 can move, so that the U-shaped locking member 44 locks the bent portion of the U-shaped latch 30, so that the U-shaped latch 30 is not easily separated from the upper outer expansion tube 13 and the lower outer expansion tube 11, and the U-shaped locking member 44 can further increase the friction between the U-shaped latch 30 and the upper outer expansion tube 13 and the lower outer expansion tube 11 under the action of the second elastic member 45. When the U-shaped latch 30 needs to be removed, the vertical rod 43 is pulled to separate the U-shaped locking member 44 from the U-shaped latch 30, and then the U-shaped latch 30 is operated. It should be noted that, in the present embodiment, the anti-slip sleeve 46 is made of a rubber material and has a certain elasticity. The anti-slip sleeve 46 can increase the friction coefficient between the person and the U-shaped latch 30, making it easier to operate the U-shaped latch 30. In addition, when the U-shaped locking piece 44 locks the bent portion of the U-shaped latch 30, the inner wall of the U-shaped locking piece 44 will contact and press against the anti-slip sleeve 46 on the outside of the U-shaped latch 30, so that the anti-slip sleeve 46 is slightly compressed to reduce the phenomenon that the U-shaped locking piece 44 is excessively squeezed to the U-shaped locking piece 44 and causes the U-shaped latch 30 to deform.

Preferably, the locking assembly 41 also includes a push-pull plate 47 and a limiting component 48. The push-pull plate 47 is fixed to one end of the vertical rod 43 away from the U-shaped locking component 44. The setting of the push-pull plate 47 facilitates the operation of the vertical rod 43. The limiting component 48 is installed on the upper outward expansion tube 13 and the lower outward expansion tube 11. The limiting component 48 includes a mounting groove 49, a third elastic member 50 and an inclined block 51. The mounting groove 49 is opened on the upper outward expansion tube 13 and the lower outward expansion tube 11 and away from the side of the mounting seat 33. The mounting groove 49 is located on the side of the fixed seat 42 away from the U-shaped locking component 44. The third elastic member 50 is fixed in the mounting groove 49. The inclined block 51 is fixed to one end of the third elastic member 50 away from the mounting groove 49, and the inclined block 51 is slidably connected to the mounting groove 49, and the inclined surface of the inclined block 51 faces the vertical rod 43.

When the U-shaped latch 30 needs to be operated, the push-pull plate 47 is pulled away from the U-shaped latch 30, so that the push-pull plate 47 pushes the inclined block 51, and the inclined block 51 is completely located in the installation groove 49 under the action of the inclined surface, and the push-pull plate 47 is continued to be pulled so that the push-pull plate 47 is located on the side of the inclined block 51 away from the U-shaped latch 30. At this time, under the action of the third elastic member 50, the inclined block 51 extends out of the installation groove 49 and restricts the push-pull plate 47, so as to facilitate the operation of the U-shaped latch 30. Similarly, when the U-shaped latch 30 needs to be locked, the inclined block 51 is pressed so that the inclined block 51 is completely located in the installation groove 49.

The implementation principle of the heat pump indoor unit of the embodiment of the present application is as follows: when it is summer, the temperature is generally high and the indoor temperature needs to be lowered. At this time, the indoor unit main body 1 outputs cold water, operates the three-way valve body 3, connects the main delivery pipe 2 with the supply pipe 5, disconnects the main delivery pipe 2 from the hot water pipe 4, and connects the supply pipe 5 with the air-conditioning and ventilation system, thereby providing cold water to the air-conditioning and ventilation system through the supply pipe 5, which is convenient for the air-conditioning and ventilation system to cool the indoor temperature; the two ends of the U-shaped pin 30 penetrate from one side of the upper outer expansion pipe 13 and the two lower outer expansion pipes 11, and pass through the pin groove 31, and then the two ends of the U-shaped pin 30 penetrate from the other side of the upper outer expansion pipe 13 and the two lower outer expansion pipes 11, thereby realizing the detachable connection between the upper outer expansion pipe 13 and the main delivery pipe 2, and between the two lower outer expansion pipes 11 and the hot water pipe 4 and the supply pipe 5 respectively.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (6)

1. Heat pump indoor unit, characterized in that: Indoor unit main body (1); A main delivery pipe (2) is arranged at the output end of the indoor unit body (1); A three-way valve body (3) is connected to the bottom of the main delivery pipe (2); A hot water pipe (4) is connected to an output end of the three-way valve body (3), and a hot water storage tank is provided at one end of the hot water pipe (4) away from the three-way valve body (3); A supply pipe (5) is connected to the other output end of the three-way valve body (3), and one end of the supply pipe (5) away from the three-way valve body (3) is connected to an air conditioning and ventilation system; The three-way valve body (3) comprises a valve core housing (7), a maintenance housing (8) and a closed housing (9) respectively connected to the two ends of the valve core housing (7), a three-way valve core (10) movably connected to the valve core housing (7), two lower external expansion pipes (11) respectively connected to the bottom of the maintenance housing (8) and the closed housing (9), an input pipe (12) arranged at the input end of the valve core housing (7), and an upper external expansion pipe (13) arranged at the end of the input pipe (12) away from the valve core housing (7), the main delivery pipe (2) is connected to the upper external expansion pipe (13), and the two lower external expansion pipes (11) are respectively connected to the hot water pipe (4) and the supply pipe (5); A connection mechanism is provided between the upper external expansion pipe (13) and the main delivery pipe (2), and between the two lower external expansion pipes (11) and the hot water pipe (4) and the supply pipe (5), respectively. The connection mechanism comprises a U-shaped latch (30). The U-shaped latch (30) passes through the upper external expansion pipe (13) and the two lower external expansion pipes (11). The ends of the main delivery pipe (2), the hot water pipe (4) and the supply pipe (5) are provided with latch grooves (31) for the U-shaped latch (30) to pass through. The connection mechanism further comprises a limiting assembly (32) for limiting the two ends of the U-shaped plug (30), the limiting assembly (32) comprising a mounting seat (33) arranged on the upper outer expansion tube (13) and the lower outer expansion tube (11), two sliders (34) slidably arranged on the mounting seat (33), a limiting block (35) arranged at one end of the slider (34), and a first elastic member (36) arranged between the two sliders (34), the limiting block (35) being provided with an insertion interface (38) for the end of the U-shaped plug (30) to be inserted, the end of the U-shaped plug (30) being arranged as an inclined surface, and the inclined surface of the U-shaped plug (30) is facing the side away from the first elastic member (36); The connection mechanism further comprises a locking assembly (41) for locking the bent portion of the U-shaped latch (30), the locking assembly (41) comprising a fixing seat (42) arranged on the upper outer expansion tube (13) and the lower outer expansion tube (11), a vertical rod (43) slidably inserted through the fixing seat (42), a U-shaped locking piece (44) arranged at one end of the vertical rod (43) and used to lock the U-shaped latch (30), and a second elastic piece (45) arranged between the fixing seat (42) and the U-shaped locking piece (44). 2. The heat pump indoor unit according to claim 1 is characterized in that: the end of the maintenance shell (8) away from the valve core shell (7) is opened, and the opening of the maintenance shell (8) is detachably connected to a maintenance plate (15), one end of the maintenance plate (15) is provided with an outer sealing circular plate (18), the other end of the outer sealing circular plate (18) is provided with a connecting strip (19), the end of the connecting strip (19) away from the outer sealing circular plate (18) is provided with an inner sealing circular plate (20), and the ends of the inner sealing circular plate (20) and the closed shell (9) that are close to each other are both provided with a valve core sealing ring (21) that cooperates with the three-way valve core (10). 3. The heat pump indoor unit according to claim 1, characterized in that: pipeline sealing rings (29) are provided on the main delivery pipe (2), the hot water pipe (4) and the supply pipe (5). 4. The heat pump indoor unit according to claim 1 is characterized in that: a special-shaped block (39) is provided at one end of the two sliders (34) close to each other, and the mounting seat (33) is slidably connected with an unlocking block (40) located between the two special-shaped blocks (39), and the unlocking block (40) is used to push the two special-shaped blocks (39) away from each other. 5. The heat pump indoor unit according to claim 1 is characterized in that: the locking assembly (41) also includes a push-pull plate (47) arranged at one end of the vertical rod (43) away from the U-shaped locking member (44) and a limiting component (48) for limiting the push-pull plate (47), the limiting component (48) includes a mounting groove (49) opened on the upper external expansion tube (13) and the lower external expansion tube (11), a third elastic member (50) arranged in the mounting groove (49) and an inclined block (51) slidably connected to the mounting groove (49), and the inclined surface of the inclined block (51) faces the vertical rod (43). 6. The heat pump indoor unit according to claim 1, characterized in that the bent portion of the U-shaped latch (30) is covered with an anti-slip cover (46).