Air source heat pump capable of delaying defrosting

Abstract

The utility model belongs to the technical field of air source heat pumps, and particularly relates to an air source heat pump capable of delaying defrosting, which comprises a box body, evaporators, a compressor, a heat exchanger, a gas-liquid separator and a four-way valve are arranged in the box body, the evaporators are arranged on the upper portion of the box body and comprise a first evaporator and two groups of second evaporators, the compressor and the second evaporator are located on the two sides of the first evaporator respectively, an electromagnetic valve is arranged between an air outlet of the compressor and an air inlet of the second evaporator, an air inlet is formed in the side wall of the box, and an air outlet is formed in the top wall of the box. The working states of the second evaporators are adjusted by arranging the electromagnetic valves, after the first evaporator is frosted, the first evaporator is defrosted by the two sets of second evaporators, and meanwhile, the first evaporator can normally heat, so that the problem that after the evaporator of an existing air source heat pump is frosted, refrigeration operation is needed for defrosting, and the defrosting time is shortened is solved. And the heating working time of the evaporator is prolonged, so that the heating effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of air source heat pumps, and in particular relates to an air source heat pump with delayed defrosting. Background Art

[0002] Air source heat pump is the most common type of heating and cooling equipment. Air source heat pump is an energy-saving device that uses high-level energy to make heat flow from a low-level heat source to a high-level heat source.

[0003] The utility model patent with publication number CN218972904U proposes an air source heat pump integrated machine, including a heat pump unit, an air outlet regulating device and a water tank assembly; a shell one is provided in the heat pump unit, and in the shell one, one side is provided with a ventilation hole plate; an evaporator is provided on the inner side of the ventilation hole plate, and a fan is provided on the inner side of the evaporator; a compressor assembly is provided on the other side of the fan, and the evaporator is connected to the compressor assembly; an air outlet regulating device is connected at the air outlet of the fan; in the air outlet regulating device, two air outlets are opened on the two side walls of the mounting shell, and a damper is installed on the inner side of the mounting shell, and a motor is connected to the damper, and the motor drives the damper to rotate so that air is discharged from one of the air outlets.

[0004] When the air source heat pump is used in winter, due to the generally low ambient temperature in winter, frost is very likely to occur. When the evaporator is severely frosted, defrosting operation is required. Conventional defrosting is achieved through the reversing of the four-way valve, that is, under normal heating conditions, the evaporator of the air source heat pump is used for heating, and the ambient temperature around the evaporator is low. When defrosting is performed, the positions of the evaporator and the condenser are switched by valve switching so that the evaporator is used for cooling. At this time, the temperature around the evaporator rises, thereby achieving the purpose of defrosting. This defrosting method affects the normal heating of the evaporator, making it impossible for the air source heat pump to continue heating, affecting the heating efficiency and heating stability of the air source heat pump. Utility Model Content

[0005] The utility model aims to provide an air source heat pump with delayed defrosting to solve the problems raised in the above background technology.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model is:

[0007] A delayed defrosting air source heat pump comprises a box body, in which an evaporator, a compressor, a heat exchanger, an air-liquid separator and a four-way valve are arranged, the evaporator is installed on the upper part of the box body, the evaporator comprises a first evaporator and a second evaporator, the second evaporator is provided with two groups, which are respectively located on both sides of the first evaporator, a solenoid valve is provided between the air outlet of the compressor and the air inlet of the second evaporator, an upper side wall of the box body is provided with an air inlet, the top wall of the box body is provided with an air outlet, and a fan is provided at the corresponding position of the side wall of the box body and the air outlet.

[0008] As an improvement, the compressor, heat exchanger and gas-liquid separator are all fixedly installed at the bottom of the box, and the four-way valve respectively connects the compressor, the first evaporator, the second evaporator, the heat exchanger and the gas-liquid separator, the air outlet of the compressor is respectively connected to the air inlet of the first evaporator and the second evaporator through the four-way valve, the air outlet of the heat exchanger is connected to the air inlet of the gas-liquid separator through the four-way valve, the air outlet of the gas-liquid separator is connected to the air inlet of the compressor, and the air outlets of the first evaporator and the second evaporator are both connected to the air inlet of the gas-liquid separator.

[0009] As a further improvement, a partition is fixedly connected to the middle of the box body, and the partition divides the box body into an upper cavity and a lower cavity. The first evaporator and the second evaporator are both located in the upper cavity. The first evaporator is provided with two groups, and the two groups of the first evaporators are arranged in a V shape with an inclined symmetry. The lower ends of the two groups of first evaporators are fixedly mounted on the partition, and the fan is installed at the upper opening of the V shape.

[0010] As a further improvement, the two groups of the second evaporators are respectively arranged obliquely on the outsides of the two groups of the first evaporators, and the inclination angle of the second evaporators is the same as the inclination angle of the first evaporators.

[0011] As a further improvement, a refrigerant storage tank is provided at the bottom of the box body, the air inlet of the refrigerant storage tank is connected to the air outlet of the first evaporator and the second evaporator through a pipeline, and the air outlet of the refrigerant storage tank is connected to the air inlet of the heat exchanger.

[0012] As a further improvement, each group of the first evaporator and the second evaporator includes a plurality of condensing tubes and heat sinks arranged horizontally and circuitously, and the heat sinks are arranged perpendicular to the condensing tubes.

[0013] As a further improvement, one end of the condenser is connected to the air inlet main pipe, and the other end is connected to the air outlet main pipe. Baffles are fixedly connected to both ends of the upper part of the box body. The width of the baffle gradually narrows from top to bottom, and the shape of the baffle corresponds to the inclination angle of the first evaporator and the second evaporator.

[0014] As a further improvement, two fans are provided, and protective nets are provided on the outer sides of the two fans.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The air source heat pump with delayed defrost provided by the utility model adjusts the working state of the second evaporator by setting a solenoid valve. When the first evaporator is frosted, the two groups of second evaporators defrost the first evaporator. At the same time, the first evaporator can operate for heating normally, and the air source heat pump can heat and provide heating normally. This solves the problem that the evaporator of the existing air source heat pump needs to be defrosted by refrigeration operation after being frosted, which affects the normal heating. It prolongs the heating working time of the evaporator and achieves a better heating effect.

[0017] The second evaporator works intermittently, which reduces the energy consumption of the heat pump and improves the working time and heat exchange efficiency of the heat pump in a low-temperature environment.

[0018] The two groups of first evaporators and second evaporators are both arranged in a V shape, so that the heat dissipation is uniform and the air outlet effect is good, so that the utilization rate of the first evaporator and the second evaporator is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 4 It is the front view of the internal structure of the utility model;

[0023] Figure 5 It is a rear view of the internal structure of the utility model;

[0024] Figure 6 It is a left view of the internal structure of the utility model;

[0025] Figure 7 It is a right view of the internal structure of the utility model;

[0026] Among them: 1-box, 2-first evaporator, 3-second evaporator, 4-compressor, 5-heat exchanger, 6-gas-liquid separator, 7-four-way valve, 8-solenoid valve, 9-air inlet, 10-air outlet, 11-fan, 12-partition, 13-refrigerant liquid storage tank, 14-condenser, 15-heat sink, 16-inlet main pipe, 17-outlet main pipe, 18-baffle. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the specific implementation methods and the accompanying drawings. The accompanying drawings are only for illustrative purposes and are only schematic diagrams, not actual drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] like Figure 1-5 As shown, an air source heat pump with delayed defrosting includes a box body 1, in which an evaporator, a compressor 4, a heat exchanger 5, a gas-liquid separator 6 and a four-way valve 7 are arranged. The evaporator is installed on the upper part of the box body 1. The evaporator includes a first evaporator 2 and a second evaporator 3. The first evaporator 2 and the second evaporator 3 are both filled with a refrigerant medium. The first evaporator 2 is used for heating under normal conditions to increase the indoor temperature. The second evaporator 3 is provided with two groups, which are respectively located on both sides of the first evaporator 2. The second evaporator 3 is used to heat the air around the first evaporator 2, thereby removing the frost on the surface of the first evaporator 2, so that the first evaporator 2 can work continuously.

[0031] A solenoid valve 8 is provided between the air outlet of the compressor 4 and the air inlet of the second evaporator 3. When the solenoid valve 8 is opened, the second evaporator 3 starts to work to heat the first evaporator 2. When the solenoid valve 8 is closed, the second evaporator 3 stops working, thereby avoiding the second evaporator 3 from defrosting when there is no frost on the surface of the first evaporator 2. The intermittent operation of the second evaporator 3 can achieve an energy-saving effect.

[0032] An air inlet 9 is provided on the upper side wall of the box body 1, an air outlet 10 is provided on the top wall of the box body 1, and a fan 11 is provided at a position corresponding to the air outlet 10 on the side wall of the box body 1. Cold air enters the box body 1 through the air inlet 9, and after heat exchange in the first evaporator 2, the heated air is blown out through the air outlet 10, thereby achieving the effect of raising the room temperature.

[0033] Specifically, the compressor 4, the heat exchanger 5 and the gas-liquid separator 6 are all fixedly installed at the bottom of the box body 1, and the four-way valve 7 connects the compressor 4, the first evaporator 2, the second evaporator 3, the heat exchanger 5 and the gas-liquid separator 6 respectively. The air outlet of the compressor 4 is connected to the air inlet of the first evaporator 2 and the second evaporator 3 respectively through the four-way valve 7, the air outlet of the heat exchanger 5 is connected to the air inlet of the gas-liquid separator 6 through the four-way valve 7, the air outlet of the gas-liquid separator 6 is connected to the air inlet of the compressor 4, and the air outlets of the first evaporator 2 and the second evaporator 3 are both connected to the air inlet of the gas-liquid separator 6.

[0034] Specifically, a partition 12 is fixedly connected to the middle of the box 1, and the partition 12 divides the box 1 into an upper cavity and a lower cavity, and the first evaporator 2 and the second evaporator 3 are both located in the upper cavity. There are two groups of first evaporators 2, and the two groups of first evaporators 2 are arranged in a V shape with tilted symmetry. The lower ends of the two groups of first evaporators 2 are fixedly mounted on the partition 12, and the fan 11 is installed at the upper opening of the V shape.

[0035] Furthermore, the two groups of second evaporators 3 are respectively arranged obliquely on the outsides of the two groups of first evaporators 2 , and the inclination angle of the second evaporator 3 is the same as the inclination angle of the first evaporator 2 .

[0036] By arranging the two groups of the first evaporator 2 and the second evaporator 3 in a V-shape, the air flow is smooth, the heat exchange area is increased, the heat exchange effect is good, and the utilization rate of the first evaporator 2 and the second evaporator 3 is higher.

[0037] Specifically, a refrigerant storage tank 13 is provided at the bottom of the box body 1, the air inlet of the refrigerant storage tank 13 is connected to the air outlets of the first evaporator 2 and the second evaporator 3 through a pipeline, and the air outlet of the refrigerant storage tank 13 is connected to the air inlet of the heat exchanger 5. The refrigerant stored in the refrigerant storage tank 13 can be used to balance the overall stability of the system and ensure stable and safe operation of the equipment.

[0038] Embodiment 2

[0039] like Figure 1 , Figure 6 , Figure 7 As shown, in this embodiment, based on the first embodiment, each group of the first evaporator 2 and the second evaporator 3 includes a plurality of condensing tubes 14 and heat sinks 15 arranged horizontally and circuitously, and the heat sinks 15 are arranged vertically to the condensing tubes 14. By arranging a plurality of condensing tubes 14 and the heat sinks 15 in coordination, the heat exchange area is increased and the heat exchange efficiency is improved.

[0040] Specifically, one end of the condenser tube 14 is connected to the air inlet pipe 16, and the other end is connected to the air outlet pipe 17. By setting the air inlet pipe 16, the refrigerant medium enters each condenser tube 14 at the same time, and by setting the air outlet pipe 17, the refrigerant medium flows out of each condenser tube 14 at the same time, so that the heat exchange speed is faster and the heat exchange effect is better.

[0041] Baffles 18 are fixedly connected to both ends of the upper part of the box body 1. The width of the baffle 18 gradually narrows from top to bottom. The shape of the baffle 18 corresponds to the inclination angle of the first evaporator 2 and the second evaporator 3, and plays a protective role on the internal structure.

[0042] Specifically, two fans 11 are provided, and protective nets are provided on the outer sides of the two fans 11. The two fans 11 can make the heat exchange speed faster.

[0043] The working principle of the utility model is: when heating, the refrigerant enters the first evaporator 2 from the compressor 4 through the four-way valve 7, exchanges heat with the air through the first evaporator 2, heats the air, and at the same time the temperature of the refrigerant decreases, and enters the heat exchanger 5, and enters the gas-liquid separator 6 through the four-way valve 7 after heat exchange in the heat exchanger 5, and finally flows back to the compressor 4 to complete a cycle. After heating for a period of time, the surface of the first evaporator 2 is frosted, and at this time the solenoid valve 8 is opened, and the refrigerant enters the second evaporator 3 from the compressor 4, so that the second evaporator 3 is heated, and the frost on the surface of the first evaporator 2 is removed. After defrosting is completed, the solenoid valve 8 is closed. In actual use, the opening time of the solenoid valve 8 can be appropriately adjusted according to the thickness of the frost on the surface of the first evaporator 2, so as to reduce energy consumption.

[0044] The air source heat pump with delayed defrosting provided by the utility model adjusts the working state of the second evaporator 3 by setting the solenoid valve 8. When the first evaporator 2 is frosted, the two groups of second evaporators 3 defrost the first evaporator 2. At the same time, the first evaporator 2 can operate for heating normally, and the air source heat pump can heat and provide heating normally. This solves the problem that the evaporator of the existing air source heat pump needs to be defrosted by refrigeration operation after being frosted, which affects the normal heating. This extends the heating working time of the first evaporator 2 and achieves a better heating effect.

[0045] The second evaporator 3 works intermittently, which reduces the energy consumption of the heat pump and improves the working time and heat exchange efficiency of the heat pump in a low-temperature environment.

[0046] The two groups of first evaporators 2 and second evaporators 3 are both arranged in a V shape, so that the heat dissipation is uniform, the heating effect is good, and the utilization rate of the first evaporator 2 and the second evaporator 3 is higher.

[0047] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An air source heat pump with delayed defrosting, comprising a box, wherein an evaporator, a compressor, a heat exchanger, a gas-liquid separator and a four-way valve are arranged in the box, characterized in that: The evaporator is installed on the upper part of the box body, and the evaporator includes a first evaporator and a second evaporator. The second evaporator is provided with two groups, which are respectively located on both sides of the first evaporator. A solenoid valve is provided between the air outlet of the compressor and the air inlet of the second evaporator. An air inlet is provided on the upper side wall of the box body, and an air outlet is provided on the top wall of the box body. A fan is provided at the corresponding position of the side wall of the box body and the air outlet.

2. The air source heat pump with delayed defrosting according to claim 1, characterized in that: The compressor, heat exchanger and gas-liquid separator are all fixedly installed at the bottom of the box body, and the four-way valve is respectively connected to the compressor, the first evaporator, the second evaporator, the heat exchanger and the gas-liquid separator, the air outlet of the compressor is respectively connected to the air inlets of the first evaporator and the second evaporator through the four-way valve, the air outlet of the heat exchanger is connected to the air inlet of the gas-liquid separator through the four-way valve, the air outlet of the gas-liquid separator is connected to the air inlet of the compressor, and the air outlets of the first evaporator and the second evaporator are both connected to the air inlet of the gas-liquid separator.

3. The air source heat pump with delayed defrosting according to claim 2, characterized in that: A partition is fixedly connected to the middle of the box body, and the partition divides the box body into an upper cavity and a lower cavity. The first evaporator and the second evaporator are both located in the upper cavity. The first evaporator is provided with two groups, and the two groups of the first evaporators are tilted and symmetrically arranged in a V shape. The lower ends of the two groups of first evaporators are fixedly mounted on the partition, and the fan is installed at the upper opening of the V shape.

4. The delayed defrosting air source heat pump according to claim 3, characterized in that: The two groups of the second evaporators are respectively arranged obliquely on the outsides of the two groups of the first evaporators, and the inclination angle of the second evaporators is the same as the inclination angle of the first evaporators.

5. The delayed defrosting air source heat pump according to claim 2, characterized in that: A refrigerant liquid storage tank is provided at the bottom of the box body, an air inlet of the refrigerant liquid storage tank is connected to the air outlets of the first evaporator and the second evaporator through a pipeline, and the air outlet of the refrigerant liquid storage tank is connected to the air inlet of the heat exchanger.

6. The air source heat pump with delayed defrosting according to claim 4, characterized in that: Each group of the first evaporator and the second evaporator includes a plurality of condensing tubes and heat sinks which are arranged horizontally and circuitously, and the heat sinks are arranged perpendicular to the condensing tubes.

7. The air source heat pump with delayed defrosting according to claim 6, characterized in that: One end of the condenser is connected to the air inlet pipe, and the other end is connected to the air outlet pipe. Baffles are fixedly connected to both ends of the upper part of the box body. The width of the baffle gradually narrows from top to bottom. The shape of the baffle corresponds to the inclination angle of the first evaporator and the second evaporator.

8. The delayed defrosting air source heat pump according to claim 1, characterized in that: Two fans are provided, and protective nets are provided on the outer sides of the two fans.

Images