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CN-122029383-A - PTAC type heat pump

CN122029383ACN 122029383 ACN122029383 ACN 122029383ACN-122029383-A

Abstract

The PTAC-type heat pump (1, 101) comprises a first battery (10) of the heat exchange type and a second battery (30) of the heat exchange type, the first battery (10) being arranged to exchange heat with an external environment in terms of the environment to be treated, and the heat pump comprises a fan (20) connected to the first battery (10) for forcing the circulation of external air through the first battery (10). The first battery (10) comprises at least two, preferably three, portions (12, 13, 14) in succession, each of which is a central portion (13) and at least one lateral portion (12, 14) that are planar, the at least one lateral portion (12, 14) being angled with respect to the central portion (13) at an intrados angle preferably comprised between 150 ° and 175 °.

Inventors

  • Stefano Botaro

Assignees

  • 艾诺瓦有限责任公司

Dates

Publication Date
20260512
Application Date
20241004
Priority Date
20231006

Claims (20)

  1. 1. A heat pump (1, 101) of the PTAC type, the heat pump (1, 101) comprising a first battery (10) of the heat exchange type and a second battery (30) of the heat exchange type, the first battery (10) being arranged to exchange heat with an external environment with respect to the environment to be treated, and the heat pump (1, 101) comprising a fan (20), the fan (20) being connected to the first battery (10) for forcing an external air flow through the first battery (10), wherein the first battery (10) comprises at least two portions in succession, preferably the first battery (10) comprises three portions (12, 13, 14) in succession, the at least two portions being a central portion (13) and at least one lateral portion (12, 14), respectively, both being planar, at an intrados angle, preferably between 150 ° and 175 °, with respect to the central portion (13).
  2. 2. The PTAC-type heat pump (1, 101) according to claim 1, wherein the fan (20) is a radial fan or an axial/centrifugal fan with backward curved blades.
  3. 3. PTAC-type heat pump (1, 101) according to claim 1, wherein the fan (20) has blades in the shape of a tapered trapezoid, and the outlet edge of the blades themselves generally follow a truncated conical extension, with a smaller base in the feeding direction.
  4. 4. The PTAC-type heat pump (1, 101) according to one or more of the preceding claims, wherein the first battery (10) comprises two lateral portions (12, 14) extending laterally on opposite sides of the central portion (13), the lateral portions (12, 14) each being angled with respect to the central portion (13) at an intrados angle comprised between 150 ° and 175 °.
  5. 5. The heat pump (1, 101) of the PTAC type according to one or more of the preceding claims, wherein the first battery (10) has an intrados side (16) and an extrados side (17), wherein at the intrados side (16) the first battery (10) constitutes a wall (18) of a box-shaped air chamber (19).
  6. 6. The heat pump (1, 101) of the PTAC type according to one or more of the preceding claims when dependent on claim 4, the heat pump (1, 101) comprising a box-shaped cover (5), the box-shaped cover (5) extending to include the first battery (10), and the box-shaped cover (5) defining a first accessory compartment (24) at the extrados side (17) in the area of at least one of the lateral portions (12, 14), the first accessory compartment (24) being configured for receiving a compressor unit (11).
  7. 7. The PTAC-type heat pump (1, 101) according to claim 6, wherein a second accessory compartment (25) is defined at the extrados side (17) between the box-shaped cover (5) and the other of the lateral portions (12, 14), the second accessory compartment (25) being configured for receiving an air handling unit (28) with a cross-flow enthalpy exchanger.
  8. 8. Heat pump (1, 101) of the PTAC type according to one or more of the previous claims when depending on claim 5, wherein the fan (20) is mounted above the box-shaped air chamber (19) in the region of the air intake opening (21).
  9. 9. The heat pump (1, 101) of the PTAC type according to one or more of claims 1 to 7 when depending on claim 5, wherein the fan (20) is mounted under the air chamber (19) in the area of the air intake opening (21).
  10. 10. Heat pump (1, 101) of the PTAC type according to one or more of the preceding claims, wherein the fan (20) is an axial fan/centrifugal fan with backward curved blades in a trapezoidal shape.
  11. 11. The heat pump (1, 101) of the PTAC type according to one or more of the preceding claims, wherein said second battery (30) is a battery in heat exchange with the interior of the environment to be treated, and said second battery (30) comprises two exchanger portions (31), said exchanger portions (31) being arranged in a V-shaped manner, and said exchanger portions (31) being divergent towards respective ventilation units (34).
  12. 12. The PTAC-type heat pump (1, 101) according to claim 11, wherein a condensate collection tray (32) is arranged in the area of the top of the second battery (30).
  13. 13. PTAC-type heat pump (1, 101) according to claim 11 or 12, wherein the end of at least one of the exchanger portions (31) opposite to the top is beveled towards the outside of the V-shape, forming a bevel (31 a), preferably the ends of two of the exchanger portions (31) opposite to the top are beveled towards the outside of the V-shape, forming a bevel (31 a).
  14. 14. Heat pump (1, 101) of the PTAC type according to one or more of claims 11 to 13, wherein the ventilation unit (34) comprises at least one tangential fan (34), preferably the tangential fan (34) is of the type having an open helix (34 a).
  15. 15. The PTAC-type heat pump (1, 101) according to claim 14, wherein a planar shut-off plate (35 a) is positioned on the opposite side to the spiral (34 a), the shut-off plate (35 a) being intended to separate the tangential flow from the fan (34).
  16. 16. PTAC-type heat pump (1, 101) according to claim 14, wherein the shut-off plate (35 a) is positioned such that, at the base of the shut-off plate (35 a) or at the position of the shut-off plate (35 a) closest to the impeller of the fan (34), the angle formed between the plane (P) of the shut-off plate (35 a) and the radial direction (R) with respect to the impeller is less than 180 °, preferably between about 120 ° and about 150 °.
  17. 17. Heat pump (1, 101) of the PTAC type according to one or more of the preceding claims when depending on claim 6, said heat pump (1, 101) comprising a heat shield (26), said heat shield (26) being arranged between said compressor group (11) and said first battery (10).
  18. 18. The heat pump (1, 101) of the PTAC type according to one or more of the preceding claims when depending on claim 7, wherein the air treatment unit (28) comprises an opening (29), and the air treatment unit (28) is configured to discharge the air treated by the enthalpy heat exchanger through said opening (29) towards the second battery (30) of heat exchange type.
  19. 19. The heat pump (1, 101) according to one or more of the preceding claims, wherein the first battery (10) is built up in a plurality of rows and comprises a plurality of tube layers (106), the end tube layers (106) of the battery (10) on one side of the fan (20) being built up in small rows to form recesses (108) in the connection joint between the battery (10) and the assembly support (107) for the fan (20) to receive the circumferential frame of the support (107).
  20. 20. Heat pump (1, 101) according to one or more of the preceding claims, wherein the second battery (30) is provided with collecting means (32) for condensate and processing means (110, 111) for condensate, the processing means (110, 111) for condensate comprising a pump (110) and at least one nozzle (111), the nozzle (111) being configured to discharge the condensate, the nozzle (111) being oriented towards the external environment in respect of the pump (1, 101), preferably the pump (110) being vibratory.

Description

PTAC type heat pump Technical Field The present invention relates to a PTAC-type heat pump, PTAC being an abbreviation for unitary terminal air conditioner (PACKAGED TERMINAL AIR Conditioning). Background This includes heating and cooling systems with autonomous heat pumps, which are typically located in hotels, homes, and other locations. Unlike a split heat pump, which is characterized by two structurally independent units connected by piping to circulate a refrigerant fluid), the PTAC includes all components in the same cover. The entire assembly is intended for wall mounting or mounting on a window by means of a through-going seat (sleeve). The PTAC is mainly provided with a planar heat exchange cell (battery) (see for example US 2023/0025205) for exchange with the external environment and the environment to be treated. The cells for heat exchange with the external environment are generally associated with a larger base of a plenum (plenum) having a truncated cone-shaped structure, on the smaller base of which a substantially axial fan is positioned to cover the cell in question by the feed flow. This typical configuration has some drawbacks, firstly, in that it limits the energy efficiency of the system, mainly but not exclusively because of the geometrical constraints of the heat exchange battery, which acts as a condenser during refrigeration. Furthermore, due to the same features of axial fans, the use of axial fans involves mounting the fan primarily on the "supply side" or upstream of the battery with respect to the airflow that covers the battery, thereby greatly restricting the uniformity of the airflow, with the airflow being concentrated primarily in the center of the battery. Finally, the air flow for heat exchange involves a supply through the central portion with respect to the single-or double-sided inlet of the cell and on the other side (in the case of a single-sided inlet or an inlet at the center). In all cases, the inlet and outlet are built in the same vertical space relative to the positioning of the battery. This can result in a partial re-inhalation of the process air, the inlet flow of which is not completely separated from the outlet flow from the cells. Furthermore, it is a fact that the air chamber has a considerable size, the machine requiring other bulky components, such as a compressor group and possibly an air treatment unit with an enthalpy exchanger for energy recovery, and therefore this known PTAC configuration is not optimal either in terms of energy or in terms of size. Another air conditioner with vertical columns is known from EP 1248049. Such an air conditioner relates to a single body type air conditioner which is adapted to be mounted on a wall, but has a different structure with respect to a conventional PTAC. In this case, a ring-shaped battery is used, which is positioned above and below each other by mounting a compressor unit at the center of a lower battery. The batteries are ventilated in an improved way with respect to the previous example, but such a configuration still does not allow to make optimal use of the dimensions and involves a substantial loss of the overall efficiency of the machine. Other types of air conditioners are described in documents WO2013/040670 and JPS 5960134. Disclosure of Invention The problem underlying the present invention is to provide a heat pump of the PTAC type, which is structured structurally and functionally to overcome at least some of the drawbacks described with reference to the prior art. In the context of this problem, an important object of the present invention is to propose a configuration and positioning of the various components of the heat pump, allowing to maximize the energy output of the machine, while controlling the size of the machine. It is a further object of the present invention to configure the use of the interior space of a PTAC heat pump such that unused interior area is minimized. Another object is to provide a heat pump that minimizes the aesthetic impact of the heat pump on the building, thereby minimizing the protrusion of the heat pump on the facade of the building on which it is installed. This problem is solved and these objects are achieved by a PTAC-type heat pump constructed according to one or more of the appended claims. In a first aspect of the invention, a PTAC-type heat pump comprises a first battery in heat exchange relationship with an external environment in terms of the environment to be treated, and a fan connected to the first battery for forcing the circulation of external air through the first battery. Preferably, the first battery comprises at least two, preferably three, portions in succession, the at least two portions being a central portion and at least one lateral portion, respectively. In the case of two lateral portions, the two lateral portions extend laterally on opposite sides of the central portion, and at least one of the lateral portions is planar and is angl