Heat pump unit and heat pump system

Abstract

The utility model relates to a heat pump unit and a heat pump system. The heat pump unit comprises a box body, a heat exchange mechanism, a supporting frame and a supporting piece. The heat exchange mechanism comprises a heat exchanger obliquely and symmetrically arranged above the box body, a water pan arranged below the heat exchanger and a fan arranged above the heat exchanger. The top width of the heat exchanger is larger than the width of the box body, and the included angle and the distance of the heat exchanger are specific values, so that the wind field uniformity of the heat exchanger is effectively improved, and the heat exchange efficiency of the heat pump unit is improved. Moreover, the utility model further provides a heat pump system, the heat pump system comprises a plurality of heat pump units and wind shields arranged between the adjacent heat pump units, independent air channels are isolated for the adjacent units through the wind shields, mutual interference is avoided, the uniformity of a wind field is effectively improved, and therefore the heat exchange efficiency of the heat pump system is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump unit and a heat pump system. Background Art

[0002] When the traditional V-shaped fin heat pump unit is operated as an evaporator, the wind field on the windward side of the fin heat exchanger will be uneven. Severe unevenness of the wind field will cause the wind speed at the top to be too high and the wind speed at the bottom to be too low, seriously affecting the heat exchange performance. The part with too high wind speed will have serious fin noise; the bottom part with too low wind speed will be prone to frost. Normally, the average maximum wind speed on the windward side of the fin is greater than 6 times the average minimum wind speed, that is, the wind speed at the bottom is below 1m / s and the wind speed at the top is above 6m / s. This uneven distribution of wind speed will lead to a decrease in the heat exchange of the heat exchanger.

[0003] In the prior art, for the uneven wind field with top air outlet distributed up and down, sacrificing a part of the air volume is effective for improving the uniformity and the heat exchange capacity of the evaporator for the fin heat exchanger as the evaporator. However, this will make the bottom of the fin heat exchanger very easy to frost due to the low wind speed, and it will form in a very short time. After the frost blocks the fins, the wind resistance increases sharply, affecting the operation of the fin heat exchanger. Therefore, it is particularly important to solve the problem of uneven wind speed on the windward side of the heat exchanger by improving the structure of the heat pump unit. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a heat pump unit, which is designed to be wide at the top and narrow at the bottom, so as to increase the air inlet and reduce the wind resistance at the bottom of the heat exchanger, thereby increasing the wind speed at the bottom of the heat exchanger and improving the wind field uniformity on the windward side of the heat exchanger. At the same time, in the actual installation and use of multiple heat pump units, this wide at the top and narrow at the bottom structure can save more space between units for maintenance without increasing the floor space.

[0005] Another object of the utility model is to provide a heat pump system, in which a plurality of heat pump units are arranged in parallel with each other or at a certain distance, and the air inlet is larger, so that more air flows into the air duct between two adjacent heat pump units, which can increase the wind speed at the bottom of the heat exchanger and improve the heat exchange capacity, while having enough space for maintenance.

[0006] A heat pump unit, comprising:

[0007] A box body and a heat exchange mechanism; the heat exchange mechanism is arranged above the box body;

[0008] The heat exchange mechanism includes at least one heat exchanger group, the heat exchanger group includes two symmetrically inclined heat exchangers, and the angle opening formed by the two heat exchangers is arranged upward; the width of the orthographic projection of the heat exchanger group on the horizontal plane is greater than the width of the orthographic projection of the box on the horizontal plane.

[0009] Furthermore, the heat exchange mechanism also includes a water receiving tray and a fan; the water receiving tray is arranged at one end of the heat exchanger close to the box body and is arranged below the heat exchanger; the fan is arranged at one end of the two groups of heat exchangers away from the box body.

[0010] Furthermore, the angle between the two heat exchangers of the heat exchanger group is 20-40°; and the minimum horizontal distance between two opposite side surfaces of the two heat exchangers is 0.2-0.5 times the diameter of the fan.

[0011] Furthermore, the box body is provided with a first side wall, and the first side wall is located below the heat exchanger; an inclined surface is provided at one end of the first side wall close to the heat exchanger; and the inclined surface is connected to the end of the water receiving tray.

[0012] Furthermore, the support frame includes a first frame group and a second frame group fixed to each other; the first frame group is fixed to the outside of the box; the second frame group is fixed to the outside of the heat exchange mechanism;

[0013] The first frame group 31 includes a plurality of cross beams and longitudinal beams arranged on the top of the box body; a plurality of the cross beams are arranged at intervals parallel to the length direction of the box body; a plurality of the longitudinal beams are arranged at intervals and vertically fixed to the cross beams;

[0014] The second frame group is provided with a plurality of columns, each of which is located in a vertical plane, one end of each column is fixedly connected to the top of the heat exchange mechanism, and the other end of each column is fixedly connected to the cross beam or the longitudinal beam.

[0015] Furthermore, the column is arranged obliquely and parallel to the heat exchanger on the same side thereof.

[0016] Furthermore, it also includes a plurality of support members, which are arranged at the bottom of the box body, and the height of the support members is 0.4-1m.

[0017] The utility model also provides a heat pump system, comprising at least two groups of the heat pump units; a plurality of the heat pump units are arranged in an array; two adjacent groups of the heat pump units are arranged to abut against each other or to be spaced a certain distance apart.

[0018] Furthermore, it also includes a plurality of wind shields; in the width direction of the heat pump unit, the wind shield is arranged between two adjacent heat pump units; one end of the wind shield is aligned with one end of the heat exchanger close to the fan and fixed, and the other end extends vertically downward; the width of the wind shield in the vertical direction is 1 / 3-1 / 2 times the height of the heat pump unit.

[0019] Furthermore, the distance between two adjacent boxes is 0.4-2m.

[0020] The beneficial effects of the utility model are:

[0021] (1) By setting the top cross-sectional width of the heat pump unit to be larger than the cross-sectional width of the box body, the wind speed at the bottom of the heat exchanger is increased, thereby improving the uniformity of the wind field of the heat exchanger;

[0022] (2) By optimizing the angle and bottom spacing of the heat exchanger, the uniformity of the wind field of the heat exchanger is further improved, and the wind speed can be reduced while maintaining the heat exchange capacity, thereby reducing the wind noise generated by high wind speed airflow;

[0023] (3) By providing an inclined surface at the upper end of the box body, the inclined surface is conducive to the rapid flow of water on the outer surface of the box body away from the surface of the box body, thereby preventing the box body from being covered with snow and ice, and improving the reliability of the operation of the heat pump unit;

[0024] (4) By providing the support, the air inlet space of the heat exchanger is increased, the wind field uniformity of the heat exchanger is further improved, and the erosion of the box body by ground water can be avoided;

[0025] (5) By setting windshields between adjacent heat pump systems, independent air ducts are formed between adjacent units to avoid interference between the air inlet airflows of adjacent heat exchangers, ensure wind speed, and increase the heat exchange capacity of the heat pump units.

[0026] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a heat pump unit provided in an embodiment of the present application;

[0028] Figure 2 A front view of a heat pump unit provided in an embodiment of the present application;

[0029] Figure 3 A side view of a heat pump unit provided in an embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of the support frame;

[0031] Figure 5 Schematic diagram of the heat pump system.

[0032] In the figure: 10-box; 11-slope; 20-heat exchange mechanism; 21-heat exchanger; 22-water tray; 23-fan; 30-support frame; 31-first frame group; 311-crossbeam; 312-longitudinal beam; 313-vertical rod; 32-second frame group; 321-column; 40-support member; 50-windshield. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "vertical direction", "upper", "lower", "horizontal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the prior art, for the uneven wind field with top air outlet distributed up and down, for the fin heat exchanger as the evaporator, sacrificing a part of the air volume and improving the uniformity is effective in improving the uniformity and the heat exchange capacity of the evaporator. However, the bottom of the fin heat exchanger is extremely easy to frost because of the low wind speed, and it forms in a very short time. After the fins are blocked, the wind resistance increases sharply, affecting the operation of the fin heat exchanger. Therefore, it is particularly important to solve the problem of uneven wind speed on the windward side of the heat exchanger by improving the structure of the heat pump unit.

[0037] Based on this, the embodiment of the present application provides a heat pump unit, which is designed as a structure that is wide at the top and narrow at the bottom, increases the air inlet, reduces the wind resistance at the bottom of the heat exchanger, and can increase the wind speed at the bottom of the heat exchanger, thereby improving the wind field uniformity of the fin heat exchanger. At the same time, during the actual installation and use of multiple heat pump units, this structure that is wide at the top and narrow at the bottom can save more space between units for maintenance without increasing the floor space.

[0038] See also Figure 1-4 The embodiment of the present application provides a heat pump unit, including: a box body 10 and a heat exchange mechanism 20, and the heat exchange mechanism 20 is arranged above the box body 10. The heat exchange mechanism 20 includes at least one group of heat exchanger groups, and the heat exchanger group includes two symmetrically inclined heat exchangers 21, and the angle formed by the two heat exchangers 21 opens upward and away from the box body 10; taking the vertical plane perpendicular to the two heat exchangers 21 as the cross section, the cross section of the heat exchanger group is V-shaped, and the horizontal direction of the cross section is defined as the width direction, and the width of the orthographic projection of the heat exchanger group in the horizontal plane is greater than the width of the orthographic projection of the box body 10 in the horizontal plane.

[0039] In this arrangement, the upper ends of the two heat exchangers 21 protrude from the vertical stretching space of the box 10, and the airflow blows from bottom to top to the windward surface of the heat exchanger 21. The wind resistance of the side of the heat exchanger 21 close to the box 10 is reduced, and the wind speed at this part is increased, so that the wind field uniformity of the windward surface of the entire heat exchanger 21 is improved, which can effectively increase the heat exchange capacity of the heat exchanger 21. When multiple groups of heat pump units are arranged in parallel, this advantage is particularly prominent, and the air duct space between two adjacent groups of heat pump units is significantly increased, so that more airflow enters the air duct space, and then the wind speed at the bottom of the heat exchanger 21 is significantly increased, thereby increasing the heat exchange capacity.

[0040] It can be understood that the heat exchange mechanism 20 can include one group of heat exchanger groups or multiple groups of heat exchanger groups; in the present embodiment, the heat exchange mechanism 20 includes two groups of heat exchanger groups, and the two groups of heat exchangers 21 are adjacently arranged along a direction perpendicular to the V-shaped cross-section. In some other embodiments, the heat exchanger groups can also be adjusted and used in combination according to the specific setting environment of the heat pump unit.

[0041] Furthermore, in some embodiments, the heat exchange mechanism 20 further includes a water receiving pan 22 and a fan 23. The water receiving pan 22 is disposed at one end of the heat exchanger 21 close to the cabinet 10 and is disposed below the heat exchanger 21 to collect defrost water from the heat exchanger 21 to prevent the defrost water from penetrating into the cabinet 10 and causing damage to the equipment inside the cabinet 10. In this embodiment, the water receiving pan 22 also serves as the upper cover of the cabinet 10, which spatially separates the heat exchange mechanism 20 and the cabinet 10.

[0042] Furthermore, the fan 23 is disposed at one end of the two heat exchangers 21 away from the box 10, and is surrounded by the two heat exchangers 21 and the water receiving tray 22 to form a heat exchange cavity. The heat exchange cavity accommodates the airflow after heat exchange by the heat exchanger 21, and then the airflow is pumped out to the outside of the heat exchange mechanism 20 through the fan 23.

[0043] See also Figure 3 Specifically, based on the heat pump unit provided in the embodiment of the present application, the angle α between the two heat exchangers 21 is set to 20-40°, which can have a wind field with higher uniformity. The minimum horizontal distance between the two opposite sides of the two heat exchangers 21 is defined as L, and the distance L is 0.2-0.5 times the diameter of the fan 23. Under this setting, the heat pump unit has the most optimized wind field uniformity, improves the wind speed at the bottom of the heat exchanger 21, and improves the heat exchange capacity of the heat exchanger 21. While maintaining the heat exchange capacity, the wind speed can be appropriately reduced to reduce the wind noise caused by high wind speed. Preferably, the angle α between the two heat exchangers 21 is set to 28-32°, and the minimum horizontal distance L between the two opposite sides of the two heat exchangers 21 is 0.31-0.35 times the diameter of the fan 23.

[0044] Further, in some embodiments, the box body 10 is provided with two first side walls, two second side walls and a bottom plate, the two first side walls are located below the two heat exchangers 21, and the two second side walls are provided at the two ends of the box body 10, and are perpendicular to the first side walls and the heat exchanger 21. The two first side walls and the two second side walls are provided between the bottom plate and the water receiving tank, and are surrounded by the bottom plate and the water receiving tank to form an accommodation space for accommodating equipment such as a compressor, a four-way valve, and an electric control box.

[0045] Furthermore, in some embodiments, a slope 11 is provided at one end of the first side wall close to the heat exchanger 21, and the slope 11 is connected to the water receiving tray 22. The slope 11 facilitates the flowing water on the outer surface of the box body 10 to quickly flow away from the surface of the box body 10, thereby preventing the box body 10 from being covered with snow and ice, and improving the reliability of the operation of the heat pump unit.

[0046] Furthermore, in some embodiments, the heat pump unit is further provided with a support frame 30 for improving the stability of the heat pump unit. Specifically, the support frame 30 includes a first frame group 31 and a second frame group 32 fixedly connected to each other, the first frame group 31 is fixedly connected to the box body 10; the second frame group 32 is fixedly connected to the heat exchange mechanism 20.

[0047] Specifically, the first frame group 31 is fixedly arranged outside the box body 10, and is provided with a plurality of cross beams 311 and a plurality of longitudinal beams 312. The plurality of cross beams 311 are parallel to the length direction of the box body 10 and are arranged at intervals, and the plurality of longitudinal beams 312 are arranged at intervals and vertically fixed to the cross beams 311, and the cross beams 311 and longitudinal beams 312 are cross-arranged at the top of the box body 10.

[0048] Furthermore, the first frame group 31 is also provided with a plurality of vertical rods 313 ; these vertical rods 313 are arranged at intervals outside the box body 10 , one end of which is fixedly connected to the cross beam 311 or the longitudinal beam 312 , and the other end of which is fixedly connected to the bottom plate of the box body 10 .

[0049] Specifically, the second frame group 32 is fixedly arranged outside the heat exchange mechanism 20, and is provided with a plurality of columns 321, one end of the plurality of columns 321 is fixedly connected to the top of the heat exchange mechanism 20, and the other end is fixedly connected to the crossbeam 311 or the longitudinal beam 312. Preferably, the ends of the plurality of columns 321 are fixedly connected to the longitudinal beam 312, and the plurality of columns are arranged in parallel with the heat exchanger 21 on the same side thereof. It is understandable that by arranging the columns 321 at an angle, while ensuring the support of the columns 321, space can also be saved. When multiple units are placed side by side, more space can be reserved between the heat pump units, which is beneficial for later maintenance. In some embodiments, a coplanar triangle is arranged at the connection between the column 321 and the longitudinal beam 312, which is used to connect and support the column 321, maintain the stability of the column 321, and facilitate the column 321 to support the heat exchange mechanism 20.

[0050] Furthermore, in some embodiments, the heat pump unit is also provided with a plurality of support members 40. The support member 40 is provided at the bottom of the housing 10, and the heat pump unit is raised by providing the support member 40. When multiple groups of heat pump units are arranged in parallel, the support member 40 raises the heat pump unit, and the bottom air inlet area between two adjacent heat pump units is expanded and enlarged, which can increase the air duct space between two adjacent heat pump units, so that the air inlet space of the heat exchange mechanism 20 is increased, and the wind speed at the bottom of the heat exchanger 21 can be increased, thereby improving the uniformity of the wind field on the windward surface of the heat exchanger 21. It can be understood that when the height of the support member 40 is too low, the increase in the air duct space is not obvious; when the height of the support member 40 is too high, the stability of the heat pump unit will be affected. Preferably, the height of the support member 40 is set to 0.4-1m, which can significantly increase the heat exchange capacity of the heat pump unit; more preferably, the height of the support member 40 is 0.5m.

[0051] Specifically, the support member 40 can be a whole piece, arranged below the box body 10, or it can be a plurality of parts, arranged at intervals below the box body 10. Preferably, in the direction in which the heat pump units are arranged in parallel, the two ends of the support member 40 slightly protrude from the two ends of the box body 10, so as to avoid the stability of the heat pump unit being affected by vibration during the operation of the heat pump unit; at the same time, the part of the support member 40 protruding from the box body 10 can be used as a cushioning part to facilitate maintenance personnel to step on it. Furthermore, a soft connection, such as a rubber vibration-damping pad, a spring, etc., can be set between the support member 40 and the box body 10 for shock and noise reduction of the heat pump unit.

[0052] See 1 and Figure 5, the embodiment of the present application also provides a heat pump system, which includes at least two groups of the above-mentioned heat pump units, and multiple heat pump units are arranged in an array. In some embodiments, a vertical plane that is perpendicular to the two heat exchangers 21 at the same time is used as a cross section, and the horizontal direction in the cross section is defined as the width direction of the heat pump unit. Multiple heat pump units are arranged in parallel along the width direction of the heat pump unit, and two adjacent heat exchangers 21 located at two adjacent heat pump units are at a certain angle. Specifically, two adjacent heat pump units are abutted against each other, or are arranged at a certain distance.

[0053] It is understandable that the adjacent heat pump units can be fixed by setting a top main beam. The top main beam can be made of square steel or other means that can maintain the stability of the heat pump unit, which will not be described in detail here.

[0054] In the prior art, the distance between two adjacent heat pump units is usually widened to reduce the interference of the airflow between the adjacent heat pump units. However, this arrangement will occupy a large floor space, and it is impossible to arrange enough heat pump units to meet the heat exchange capacity in the limited space. Therefore, in some embodiments, the spacing distance between the boxes 10 of two adjacent groups of heat pump units is set to 0.4-2m, which can ensure sufficient air intake space without occupying too much floor space.

[0055] In addition, in some embodiments, a windshield 50 is provided between adjacent heat pump units to reduce the mutual interference of the airflow between adjacent heat pump units. One end of the windshield 50 is aligned with one end of the heat exchanger close to the fan and fixedly provided, and the other end extends vertically downward to a certain width. Preferably, the vertical extension width of the windshield 50 is 1 / 3-1 / 2 times the height of the heat pump unit. In this arrangement, the air intake space between adjacent heat pump units can be effectively isolated, providing each heat pump unit with a relatively independent air duct to avoid mutual interference and effectively increase the flow rate of the air intake.

[0056] Specifically, the wind shield 50 can be fixedly connected to the top main beam, specifically, by means of bolts, riveting or welding, etc., which will not be elaborated here.

[0057] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0058] (1) By setting the top cross-sectional width of the heat pump unit to be larger than the cross-sectional width of the box body, the wind speed at the bottom of the heat exchanger is increased, thereby improving the uniformity of the wind field of the heat exchanger;

[0059] (2) By optimizing the angle and bottom spacing of the heat exchanger, the uniformity of the wind field of the heat exchanger is further improved, and the wind speed can be reduced while maintaining the heat exchange capacity, thereby reducing the wind noise generated by high wind speed airflow;

[0060] (3) By providing an inclined surface at the upper end of the box body, the inclined surface is conducive to the rapid flow of water on the outer surface of the box body away from the surface of the box body, thereby preventing the box body from being covered with snow and ice, and improving the reliability of the operation of the heat pump unit;

[0061] (4) By providing the support, the air inlet space of the heat exchanger is increased, the wind field uniformity of the heat exchanger is further improved, and the erosion of the box body by ground water can be avoided;

[0062] (5) By setting windshields between adjacent heat pump systems, independent air ducts are formed between adjacent units to avoid interference between the air inlet airflows of adjacent heat exchangers, ensure wind speed, and increase the heat exchange capacity of the heat pump units.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A heat pump unit, characterized in that: include: A box body and a heat exchange mechanism; the heat exchange mechanism is arranged above the box body; The heat exchange mechanism includes at least one heat exchanger group, the heat exchanger group includes two symmetrically inclined heat exchangers, and the angle opening formed by the two heat exchangers is arranged upward; the width of the orthographic projection of the heat exchanger group on the horizontal plane is greater than the width of the orthographic projection of the box on the horizontal plane.

2. A heat pump unit according to claim 1, characterized in that: The heat exchange mechanism also includes a water receiving tray and a fan; the water receiving tray is arranged at one end of the heat exchanger close to the box body and is arranged below the heat exchanger; the fan is arranged at one end of the two groups of heat exchangers away from the box body.

3. A heat pump unit according to claim 2, characterized in that: The angle between the two heat exchangers of the heat exchanger group is 20-40°; and the minimum horizontal distance between the two opposite side surfaces of the two heat exchangers is 0.2-0.5 times the diameter of the fan.

4. A heat pump unit according to claim 2, characterized in that: The box body is provided with a first side wall, and the first side wall is located below the heat exchanger; an inclined surface is provided at one end of the first side wall close to the heat exchanger; and the inclined surface is connected to the end of the water receiving tray.

5. A heat pump unit according to claim 1, characterized in that: Also includes: The support frame comprises a first frame group and a second frame group fixed to each other; the first frame group is fixed to the outside of the box; the second frame group is fixed to the outside of the heat exchange mechanism; The first frame group includes a plurality of cross beams and longitudinal beams arranged on the top of the box body; a plurality of the cross beams are arranged at intervals parallel to the length direction of the box body; a plurality of the longitudinal beams are arranged at intervals and vertically fixed to the cross beams; The second frame group is provided with a plurality of columns, each of which is located in a vertical plane, one end of each column is fixedly connected to the top of the heat exchange mechanism, and the other end of each column is fixedly connected to the cross beam or the longitudinal beam.

6. A heat pump unit according to claim 5, characterized in that: The column is arranged obliquely and is parallel to the heat exchanger on the same side thereof.

7. A heat pump unit according to claim 1, characterized in that: Also includes: A plurality of support members are provided at the bottom of the box body, and the height of the support members is set to 0.4-1m.

8. A heat pump system, characterized in that: include: At least two groups of heat pump units according to any one of claims 1 to 7; a plurality of said heat pump units are arranged in an array; two adjacent groups of said heat pump units are arranged in contact with each other or at a certain distance.

9. A heat pump system according to claim 8, characterized in that: Also includes: A plurality of wind shields; in the width direction of the heat pump unit, the wind shield is arranged between two adjacent heat pump units; one end of the wind shield is aligned with the end of the heat exchanger away from the box body and fixedly arranged, and the other end extends vertically downward; the width of the wind shield in the vertical direction is 1 / 3-1 / 2 times the height of the heat pump unit.

10. A heat pump system according to claim 8, characterized in that: The distance between two adjacent boxes is 0.4-2m.

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