Conduit orifice shrinkage structure for preventing cold island effect

Abstract

The utility model discloses a conduit orifice shrinkage structure for preventing cold island effect, which comprises a plurality of air source heat pumps, the plurality of air source heat pumps are arranged in a matrix form, an evaporator is arranged in each air source heat pump, the top of each evaporator is connected with a fan, and the top of each air source heat pump is connected with a heat exchanger. The fan is connected with a guide pipe assembly, and the pipe diameter of the end, away from the fan, of the guide pipe assembly shrinks or expands, so that the speed of cold air flowing out of the fan is changed after passing through the guide pipe assembly. According to the guide pipe orifice shrinkage structure for preventing the cold island effect, the pipe diameter of one end, far away from the fan, of the guide pipe assembly is shrunk, so that the jet velocity of cold air is increased, the jet height of the cold air is higher, the temperature of the cold air is increased under the action of the ambient temperature, and when the cold air flows back to the evaporator, the cold island effect is prevented. The cold air recovers to the environment temperature, the cold island effect is effectively restrained, and the heat exchange efficiency of the air source heat pump is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air source heat pumps, and in particular relates to a conduit orifice contraction structure for preventing cold island effect. Background Art

[0002] An air source heat pump is an energy-saving device that uses air as a heat source and absorbs and utilizes the heat energy in the air through a working fluid. It consists of four parts: an evaporator, a compressor, a condenser, and an expansion valve. It is a heat energy utilization system with relatively high energy efficiency.

[0003] During operation, the air source heat pump absorbs the heat of the surrounding air and outputs energy from the heat pump to provide heating to the end user. When installing, the air source heat pump is usually placed in an outdoor ventilated area. However, sometimes the air source heat pump is not allowed to be placed in an outdoor ventilated area, so sometimes the air source heat pump is placed in a poorly ventilated place. As the air source heat pump runs, the surrounding air temperature continues to decrease. Due to the lack of external air supplementation and replacement, the temperature of the air around the air source heat pump is lower than the normal air temperature, thus forming a cold island effect. In addition, when multiple heat exchange units are operated together, due to space limitations, when multiple hosts are running at the same time, especially when the wind speed is low or there is no wind, a cold island effect will occur in the host group layout area, causing the heat exchange efficiency to be greatly reduced.

[0004] Therefore, it is urgent to design a duct mouth contraction structure to prevent the cold island effect, so as to solve the problem that the temperature of the air around the air source heat pump mentioned above is lower than the normal air temperature, thereby forming a cold island effect and reducing the heat exchange efficiency of the air source heat pump. Utility Model Content

[0005] In order to solve the technical problem mentioned in the background technology that the temperature of the air around the air source heat pump is lower than the normal air temperature, thereby forming a cold island effect and reducing the heat exchange efficiency of the air source heat pump, a duct nozzle contraction structure for preventing the cold island effect is provided to solve the above problem.

[0006] In order to achieve the above-mentioned purpose, the specific technical scheme of the conduit orifice contraction structure for preventing the cold island effect of the utility model is as follows:

[0007] A duct orifice contraction structure for preventing cold island effect comprises a plurality of air source heat pumps which are arranged in a matrix form, an evaporator is arranged in each air source heat pump, a fan is connected to the top of the evaporator, a duct assembly is connected to the fan, and the diameter of the duct assembly at one end away from the fan is contracted or expanded so that the velocity of the cold air flowing out of the fan changes after passing through the duct assembly.

[0008] Furthermore, the duct assembly includes a shell body, one end of the shell body is provided with a first connecting end, and the first connecting end is connected to the fan.

[0009] Furthermore, the duct assembly also includes a plurality of blades, which are arranged in the outer shell body, and the plurality of blades are stacked in sequence to form a gas channel. One end of the plurality of blades is hinged to the first connecting end, and the other ends of the plurality of blades move in a radial direction relative to the outer shell body to shrink or expand the diameter of the gas channel to change the rate at which the cold air passes through the gas channel.

[0010] Furthermore, a plurality of first connecting columns are arranged in the first connecting end, a second connecting column is arranged at one end of the plurality of blades close to the first connecting end, and the first connecting columns are hinged to the second connecting columns.

[0011] Furthermore, it also includes a moving sleeve, the end of the outer shell body away from the first connecting end is provided with a second connecting end, the moving sleeve is sleeved in the second connecting end, the moving sleeve is sleeved outside the plurality of blades, the moving sleeve moves along the axial direction of the outer shell body, the moving sleeve squeezes the plurality of blades, and the plurality of blades move along the radial direction relative to the outer shell body, so that the diameter of the gas channel is contracted or expanded,

[0012] Furthermore, an outer thread is arranged on the outer circumference of the movable sleeve, and an inner thread is arranged on the inner circumference of the second connecting end. The outer thread is threadedly connected with the inner thread, and the movable sleeve is rotated to move along the axial direction of the outer shell body.

[0013] Furthermore, it also includes a cylinder, which is connected to the second connecting end, and the driving end of the cylinder is connected to the movable sleeve. The cylinder is extended and retracted to make the movable sleeve move along the axial direction of the shell body.

[0014] Furthermore, it also includes a plurality of elastic members, one end of each of which is connected to the inner circumference of the movable sleeve, and the other end of each of the plurality of elastic members is connected to a blade respectively.

[0015] Furthermore, the elastic member is a spring.

[0016] Furthermore, the blades are elastic blades.

[0017] The conduit orifice contraction structure for preventing the cold island effect of the utility model has the following advantages:

[0018] When multiple air source heat pumps are arranged in a matrix form, each air source heat pump is provided with an evaporator, and a fan is connected to the top of the evaporator. A duct assembly is connected to the fan, and the tube diameter of the duct assembly at the end away from the fan shrinks or expands, so that the cold air flowing out of the fan changes its velocity after passing through the duct assembly, and the tube diameter of the duct assembly at the end away from the fan shrinks, so that the cold air jet speed becomes larger, and the height of the cold air is ejected higher, so that the temperature of the cold air rises under the influence of the surrounding ambient temperature, and when the cold air flows back to the evaporator, the cold air returns to the ambient temperature, effectively suppressing the cold island effect and improving the heat exchange efficiency of the air source heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the cold island effect of the air source heat pump in the prior art of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model air source heat pump arranged in a matrix form;

[0021] Figure 3 It is a structural schematic diagram of the conduit port contraction structure for preventing the cold island effect of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the housing body of the utility model;

[0023] Figure 5 The structure diagram of the blade and the movable sleeve of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 6 The structure diagram of the blade and the movable sleeve of the utility model is shown in FIG. Figure 2 .

[0025] Description of the markings in the figure:

[0026] 1. Evaporator; 2. Fan; 3. Duct assembly; 31. Shell body; 311. First connection end; 3111. First connection column; 312. Second connection end; 3121. Internal thread; 32. Blade; 321. Second connection column; 33. Moving sleeve; 331. External thread; 34. Spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0029] Please refer to the attached Figure 1 To Attachment Figure 6 The utility model describes a conduit orifice contraction structure for preventing cold island effect.

[0030] like Figure 1 As shown, multiple air source heat pump units are connected in parallel, and multiple air source heat pumps are arranged in a matrix form, which is an important heating method for centralized heating. At low wind speeds, the density of the cold air discharged from evaporator 1 is greater than that of the ambient air, and it cannot be effectively mixed with the ambient air. The cold air will sink, and the sinking cold air will enter the evaporator 1 from the inlet of evaporator 1 for heat exchange. Under normal circumstances, the air inhaled at the inlet of evaporator 1 is ambient air. After the ambient air undergoes heat exchange in evaporator 1, the cold air is discharged from fan 2. However, when the cold air is inhaled at the inlet of evaporator 1 for heat exchange, the cold air is lower than the ambient air temperature, which will cause the air temperature inside evaporator 1 to drop, forming a cold island effect, which affects the heat exchange efficiency of the air source heat pump. The direction of the cold air flow is as shown in the figure. Figure 1 Therefore, after the cold air sinks, the temperature of the cold air needs to be increased to prevent the cold air from entering the evaporator 1 for heat exchange. Therefore, it is urgent to design an air source heat pump structure that prevents the cold island effect to solve the above-mentioned problems.

[0031] like Figure 2 and Figure 3 As shown, the duct orifice contraction structure for preventing the cold island effect in the utility model includes a plurality of air source heat pumps, which are arranged in a matrix form, and each air source heat pump is provided with an evaporator 1, and a fan 2 is connected to the top of the evaporator 1, and a duct assembly 3 is connected to the fan 2, and the diameter of the duct assembly 3 at one end away from the fan 2 is contracted or expanded, so that the cold air flowing out of the fan 2 changes its velocity after passing through the duct assembly 3. The structure of the duct assembly 3 is not limited, as long as the diameter of the duct assembly 3 at one end away from the fan 2 can be contracted or expanded.

[0032] When multiple air source heat pumps are arranged in a matrix form, an evaporator 1 is provided in each air source heat pump, a fan 2 is connected to the top of the evaporator 1, a duct assembly 3 is connected to the fan 2, and the tube diameter of the duct assembly 3 at the end away from the fan 2 shrinks or expands, so that the cold air flowing out of the fan 2 changes its velocity after passing through the duct assembly 3, so that the tube diameter of the duct assembly 3 at the end away from the fan 2 shrinks, the cold air jet speed becomes larger, and the cold air is ejected at a higher height, so that the temperature of the cold air rises under the influence of the surrounding ambient temperature, and when the cold air flows back to the evaporator 1, the cold air returns to the ambient temperature, effectively suppressing the cold island effect and improving the heat exchange efficiency of the air source heat pump.

[0033] Further, if Figures 2 to 4As shown, the duct assembly 3 includes a shell body 31, and a first connection end 311 is provided at one end of the shell body 31. The first connection end 311 is connected to the fan 2, so that the cold air from the fan 2 enters the air through the shell body 31. In this embodiment, the diameter of the first connection end 311 is fixed, and the first connection end 311 and the fan 2 can be bolted or clamped, as long as the first connection end 311 and the fan 2 can be fixedly connected, so that the cold air of the fan 2 can enter the shell body 31.

[0034] Further, if Figures 2 to 6 As shown, the duct assembly 3 also includes a plurality of blades 32, which are arranged in the outer shell body 31, and the plurality of blades 32 are stacked in sequence to form a gas channel. One end of the plurality of blades 32 is hinged to the first connecting end 311, and the other end of the plurality of blades 32 moves in a radial direction relative to the outer shell body 31 to shrink or expand the diameter of the gas channel to change the rate at which the cold air passes through the gas channel.

[0035] When the temperature of the cold air coming out of the fan 2 differs from the external ambient temperature by less than 2°C, it is considered that there is basically no cold island effect, the inlet and outlet diameters of the duct assembly 3 are the same, and there is no need to adjust the blades 32 to move in the radial direction relative to the outer shell body 31; when the temperature of the cold air coming out of the fan 2 is 3-6°C lower than the external ambient temperature, it is considered that a cold island effect occurs. At this time, the blades 32 are adjusted to move in the radial direction relative to the outer shell body 31 to shrink the diameter of the gas channel to adjust the jet speed and height of the cold air and suppress the cold island effect until the temperature difference between the cold air coming out of the fan 2 and the external environment is controlled within 2°C.

[0036] Further, if Figures 2 to 6 As shown, a plurality of first connection columns 3111 are provided in the first connection end 311, and a second connection column 321 is provided at one end of the plurality of blades 32 close to the first connection end 311, and the first connection column 3111 is hinged to the second connection column 321. By hingedly connecting the first connection column 3111 to the second connection column 321, when the blades 32 move in the radial direction relative to the shell body 31, the inlet pipe diameter of the gas channel surrounded by the blades 32 close to the first connection end 311 remains unchanged, and the outlet pipe diameter of the gas channel surrounded by the blades 32 changes, and the outlet pipe diameter of the gas channel becomes smaller, so as to adjust the jet speed and height of the cold air coming out of the fan 2, suppress the cold island effect, and the outlet pipe diameter of the gas channel becomes larger, the jet speed of the cold air becomes lower, and the jet height is reduced.

[0037] Further, if Figures 2 to 6As shown, the duct orifice contraction structure for preventing the cold island effect also includes a movable sleeve 33. A second connection end 312 is provided at one end of the outer shell body 31 away from the first connection end 311. The movable sleeve 33 is sleeved in the second connection end 312. The movable sleeve 33 is sleeved outside the plurality of blades 32. The movable sleeve 33 moves along the axial direction of the outer shell body 31. The movable sleeve 33 squeezes the plurality of blades 32. The plurality of blades 32 move along the radial direction relative to the outer shell body 31 to shrink or expand the diameter of the gas channel. By setting the movable sleeve 33, the movable sleeve 33 moves along the axial direction of the outer shell body 31 toward the direction close to the fan 2. The plurality of blades 32 inside the movable sleeve 33 will be squeezed, and the plurality of blades 32 move toward the center, so that the outlet diameter of the gas channel surrounded by the plurality of blades 32 becomes smaller, thereby adjusting the jet speed and height of the cold air coming out of the fan 2 to suppress the cold island effect.

[0038] Further, if Figures 2 to 6 As shown, the conduit orifice contraction structure for preventing the cold island effect of the utility model also includes a plurality of elastic members, one end of each of which is connected to the inner periphery of the movable sleeve 33, and the other ends of each of the plurality of elastic members are respectively connected to a blade 32. In this embodiment, the elastic member is a spring 34, and a plurality of springs 34 are provided, so that when the movable sleeve 33 moves along the axial direction of the outer shell body 31 in a direction away from the fan 2, the blade 32, under the action of the elastic force of the spring 34, enlarges the outlet pipe diameter of the gas channel. In other embodiments, the spring 34 is also not provided, and the blade 32 is directly an elastic elastic blade 32. When the movable sleeve 33 moves along the axial direction of the outer shell body 31 in a direction away from the fan 2, the blade 32, under the action of its own elastic force, enlarges the outlet pipe diameter of the gas channel.

[0039] Further, if Figures 2 to 6 As shown, the outer circumference of the movable sleeve 33 is provided with an external thread 331, and the inner circumference of the second connection end 312 is provided with an internal thread 3121. The external thread 331 is screwed with the internal thread 3121, and the movable sleeve 33 is rotated to make the movable sleeve 33 move along the axial direction of the outer shell body 31. In this embodiment, the height of the movable sleeve 33 is greater than the height of the second connection end 312, that is, the movable sleeve 33 is arranged higher than the second connection end 312, so that the movable sleeve 33 can be rotated relative to the second connection end 312. In other embodiments, it also includes a cylinder, the cylinder is connected to the second connection end 312, the driving end of the cylinder is connected to the movable sleeve 33, and the cylinder is telescopic to make the movable sleeve 33 move along the axial direction of the outer shell body 31, so as to realize the movement of the movable sleeve 33 relative to the outer shell body 31 in the axial direction, thereby realizing the adjustment of the size of the outlet pipe diameter of the gas channel formed by the blades 32.

[0040] The working principle of the conduit port contraction structure for preventing the cold island effect of the utility model is as follows;

[0041] A plurality of air source heat pumps are arranged in a matrix form, and an evaporator 1 is provided in each air source heat pump. A fan 2 is connected to the top of the evaporator 1, and the fan 2 is connected to the first connection end 311. The cold air from the fan 2 enters the housing body 31 through the first connection end 311, that is, enters the gas channel formed by the plurality of blades 32. When the temperature of the cold air from the fan 2 is 3-6°C lower than the external ambient temperature, it is considered that a cold island effect is generated. At this time, the movable sleeve 33 moves along the axial direction of the housing body 31 toward the fan 2, and the plurality of blades 32 inside the movable sleeve 33 are squeezed, and the plurality of blades 32 are moved closer to the center, so that the outlet diameter of the gas channel surrounded by the plurality of blades 32 becomes smaller, thereby adjusting the jet velocity and height of the cold air from the fan 2 to suppress the cold island effect.

[0042] When the temperature of the cold air coming out of the fan 2 differs from the external ambient temperature by less than 2°C, it is considered that there is basically no cold island effect. When the movable sleeve 33 moves along the axial direction of the shell body 31 in the direction away from the fan 2, the blades 32, under the action of elastic force, increase the outlet diameter of the gas channel, reduce the jet speed of the cold air, and reduce the jet height, or restore the blades 32 to their initial positions, so that the inlet and outlet diameters of the gas channel are the same.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A conduit orifice contraction structure for preventing cold island effect, characterized in that: It includes multiple air source heat pumps, which are arranged in a matrix form. Each air source heat pump is provided with an evaporator. The top of the evaporator is connected to a fan, and the fan is connected to a duct assembly. The diameter of the duct assembly away from the fan shrinks or expands so that the velocity of the cold air flowing out of the fan changes after passing through the duct assembly.

2. The conduit orifice contraction structure for preventing the cold island effect according to claim 1, characterized in that: The duct assembly comprises a shell body, one end of which is provided with a first connecting end, and the first connecting end is connected to the fan.

3. The conduit port contraction structure for preventing cold island effect according to claim 2, characterized in that: The duct assembly also includes a plurality of blades, which are arranged in the outer shell body, and the plurality of blades are stacked in sequence to form a gas channel. One end of the plurality of blades is hinged to the first connecting end, and the other end of the plurality of blades moves in a radial direction relative to the outer shell body to shrink or expand the diameter of the gas channel to change the rate at which the cold air passes through the gas channel.

4. The conduit port contraction structure for preventing cold island effect according to claim 3, characterized in that: A plurality of first connecting columns are arranged in the first connecting end, a second connecting column is arranged at one end of the plurality of blades close to the first connecting end, and the first connecting columns are hinged to the second connecting columns.

5. The conduit port contraction structure for preventing cold island effect according to claim 3, characterized in that: It also includes a movable sleeve, a second connecting end is provided at one end of the outer shell body away from the first connecting end, the movable sleeve is sleeved in the second connecting end, the movable sleeve is sleeved outside the multiple blades, the movable sleeve moves along the axial direction of the outer shell body, the movable sleeve squeezes the multiple blades, and the multiple blades move along the radial direction relative to the outer shell body to shrink or expand the diameter of the gas channel.

6. The conduit port contraction structure for preventing cold island effect according to claim 5, characterized in that: The outer circumference of the movable sleeve is provided with an external thread, and the inner circumference of the second connecting end is provided with an internal thread. The external thread is threadedly connected with the internal thread, and the movable sleeve is rotated to move along the axial direction of the shell body.

7. The conduit port contraction structure for preventing cold island effect according to claim 5, characterized in that: It also includes a cylinder, which is connected to the second connecting end, and a driving end of the cylinder is connected to the movable sleeve. The cylinder is extended and retracted to make the movable sleeve move along the axial direction of the shell body.

8. The conduit port contraction structure for preventing cold island effect according to claim 5, characterized in that: It also includes a plurality of elastic members, one end of which is connected to the inner circumference of the moving sleeve, and the other end of which is respectively connected to a blade.

9. The conduit port contraction structure for preventing cold island effect according to claim 8, characterized in that: The elastic member is a spring.

10. The conduit port contraction structure for preventing cold island effect according to claim 3, characterized in that: The blades are elastic blades.

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