JP2015165120A - Centrifugal blower and temperature conditioning system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a temperature sensor on a centrifugal blower without increasing the size of the centrifugal blower.SOLUTION: A centrifugal blower 2 an impeller 21 having a plurality of blades 21a around a rotation shaft 24; a casing 23 having a voluted wall part 23a which introduces air discharged from the impeller 21 to a discharge port 23e, and a suction port 23f formed in one side of the rotation shaft 24; and a temperature sensor 8 which is fixed to a tongue part 23d being a base point of the wall part 23a and detects the temperature of air suctioned from the suction port 23f into the casing 23.

Description

  The present invention relates to a centrifugal blower and a temperature control device using the same.

  Patent Document 1 discloses a configuration in which a heating heater and a cooling heat exchanger are arranged in a battery case and the air in the battery case is circulated by a centrifugal blower for the purpose of adjusting the temperature of the battery.

JP2013-171622A

  In such a temperature control device, in order to determine the operating state of the heater for heating and the heat exchanger for cooling required for controlling the temperature control target such as a battery to a desired temperature, and the air flow rate of the centrifugal blower In addition to the temperature of the temperature control object itself, it is preferable to grasp the temperature of the air sucked into the centrifugal blower.

  However, when the temperature sensor is attached to the casing of the centrifugal fan, it is necessary to prepare another part for fixing the temperature sensor and attach the temperature sensor to the casing, which causes the centrifugal fan to become large.

  This invention is made | formed in view of such a technical subject, and it aims at attaching a temperature sensor to a centrifugal blower, without enlarging a centrifugal blower.

  According to an aspect of the present invention, the centrifugal blower includes an impeller provided with a plurality of blades around the rotation shaft, and a spiral wall portion that guides the air discharged from the impeller to the discharge port. A casing having a suction port formed on one side of the rotating shaft, and a temperature sensor that is fixed to a tongue that is a base point of the wall and detects a temperature of air sucked into the casing from the suction port; A centrifugal blower characterized by comprising:

  According to the said aspect, it becomes unnecessary to provide the structure and components for fixing a temperature sensor separately, and a temperature sensor can be attached to a centrifugal blower, without enlarging a centrifugal blower.

It is a schematic block diagram of the temperature control apparatus provided with the centrifugal blower which concerns on embodiment of this invention. It is II-II sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration of a temperature control device 1 including a centrifugal blower 2 according to an embodiment of the present invention. FIG. 2 is a II-II cross section of FIG.

  The temperature control device 1 includes a centrifugal blower 2, a duct 4, a PTC heater 5, a cooling heat exchanger 6, and a controller 7. When the air discharged from the centrifugal blower 2 flows into the duct 4, the temperature is adjusted to a desired temperature by the PTC heater 5 and the cooling heat exchanger 6, and further to a temperature control target (for example, a vehicle battery) disposed downstream. Sent. The desired temperature is the temperature of air necessary for controlling the temperature control object to an appropriate temperature.

  The centrifugal blower 2 includes an impeller 21, a motor 22, and a casing 23.

  The impeller 21 is a cylindrical fan in which a plurality of blades 21 a are arranged around the rotation shaft 24, and is rotated by a motor 22.

  The casing 23 includes a spiral wall portion 23a, a ceiling portion 23b connected to the upper end of the wall portion 23a, and a bottom portion 23c connected to the lower end of the wall portion 23a. The casing 23 is integrated with the duct 4 connected to the downstream side of the casing 23, and is composed of two parts that can be divided vertically. In FIG. 1, the upper part of these two parts is not shown for easy understanding.

  An impeller 21 is disposed inside the casing 23, and a motor 22 is fixed to the bottom 23c. The wall portion 23a extends around the impeller 21 with the tongue portion 23d as a base point, and a discharge port 23e is formed between the tongue portion 23d and a portion opposed thereto. A suction port 23f is formed at the center of the ceiling 23b, that is, above the rotation shaft 24 of the impeller 21. A temperature sensor 8 for detecting the temperature of air flowing into the casing 23 from the suction port 23f is attached to the tongue 23d. The mounting structure of the temperature sensor 8 will be described later.

  The PTC heater 5 includes a heating element that generates heat when energized, and a plurality of air passages that send air flowing from the upstream side to the downstream side while contacting the heating element. When air flows into the PTC heater 5 while the heating element is energized and heated, the air is heated by the heating element, and the air whose temperature has risen flows out of the PTC heater 5.

  The cooling heat exchanger 6 is an evaporator of a refrigeration cycle. When air flows into the cooling heat exchanger 6 during the refrigeration cycle operation, heat is exchanged between the refrigerant and the air to cool the air, and the air whose temperature has dropped flows out of the cooling heat exchanger 6.

  The controller 7 includes a mypro processor, a memory, an input interface, an output interface, and the like. Based on the temperature of the temperature control target itself and the temperature of the air detected by the temperature sensor 8, the centrifugal blower 2, the PTC heater 5 and change the operating state of the refrigeration cycle.

  For example, when the detected temperature of the air is higher than the temperature required to control the temperature control target to an appropriate temperature, the refrigeration cycle of the refrigeration cycle is further cooled by the cooling heat exchanger 6. While increasing the rotational speed of the compressor, the rotational speed of the motor 22 is increased to increase the air flow rate of the centrifugal blower 2. On the other hand, when the detected temperature of the air is lower than the required temperature, the energization amount to the PTC heater 5 is increased so that the air is further heated by the PTC heater 5.

  According to the above configuration, when the impeller 21 is rotationally driven by the motor 22, the air inside the impeller 21 is discharged toward the outside by centrifugal force. Further, when the inside of the impeller 21 becomes negative pressure, air is sucked into the impeller 21 from the suction port 23f.

  The air discharged from the impeller 21 is guided to the discharge port 23e by the wall portion 23a, flows into the duct 4, and the temperature control target is controlled to an appropriate temperature by the PTC heater 5 and the cooling heat exchanger 6. It is adjusted to the temperature required for

  Next, the structure of the temperature sensor 8 and its mounting structure will be described.

  As shown in FIG. 2, the temperature sensor 8 includes a sensing portion 81, a shaft portion 82 extending from the sensing portion 81, and a wiring 83 extending from the lower end of the shaft portion 82, and is attached using the tongue portion 23d. .

  The tongue portion 23d is thicker than other portions of the wall portion 23a, and an attachment hole 23g extending in the axial direction of the rotating shaft 24 of the impeller 21 is formed inside. The attachment hole 23 g is a through hole that penetrates the casing 23.

  The temperature sensor 8 is fixed to the shaft portion 82 in the female screw portion formed in the mounting hole 23g, in which the shaft portion 82 is inserted into the mounting hole 23g, and a claw (not shown) is engaged with the hook on the casing 23 side. This is done by screwing the male screw part.

  Thereby, the sensing part 81 is exposed to the suction port 23f side of the casing 23, and the temperature sensor 8 can detect the temperature of the air sucked into the casing 23 from the suction port 23f. Moreover, the wiring 83 of the temperature sensor 8 is taken out from the side opposite to the suction port 23f through the mounting hole 23g.

  Then, the effect of this embodiment is demonstrated.

  According to the present embodiment, the temperature sensor 8 that detects the temperature of the air sucked into the casing 23 from the suction port 23f is fixed to the tongue 23d. Thereby, it is not necessary to separately provide a structure and parts for fixing the temperature sensor 8, and the temperature sensor 8 can be attached to the centrifugal fan 2 without increasing the size of the centrifugal fan 2 and the temperature control device 1 using the centrifugal fan 2. it can.

  Further, the casing 23 can be divided in the axial direction of the rotary shaft 24, and the shaft portion 82 of the temperature sensor 8 is fixed to the mounting hole 23g extending in the axial direction of the rotary shaft 24 in the tongue portion 23d. Thereby, when molding the casing 23 with a metal mold | die, the attachment hole 23g can be shape | molded simultaneously, and the manufacturing cost of the centrifugal blower 2 and the temperature control apparatus 1 using the same can be lowered | hung.

  In addition, the mounting hole 23g is a through hole, and the wiring 83 of the temperature sensor 8 extends from the side opposite to the suction port 23f, thereby facilitating the layout of the wiring 83 of the temperature sensor 8. Moreover, since the wiring 83 of the temperature sensor 8 is taken out on the same side as the wiring 22a of the motor 22, these wiring 83 and 22a can be bundled, and it can prevent that wiring 83 and 22a become complicated.

  The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  For example, in the above embodiment, the PTC heater 5 and the cooling heat exchanger 6 are arranged on the downstream side of the discharge port 23e to change the temperature of the air sent to the temperature control target, but the temperature of the air is changed. The device is not limited to these, and other heating devices and cooling devices can be used.

  Further, it is not essential to provide a heating device and a cooling device on the downstream side of the discharge port 23e, and only one of them may be provided. It may be a configuration that only controls the air flow rate.

  Moreover, the aspect which fixes the temperature sensor 8 to the tongue part 23d is not limited to the aspect which forms the attachment hole 23g in the tongue part 23d, and fixes the axial part 82 of the temperature sensor 8 to this, It is upward from the tongue part 23d. An extending fixing portion may be erected and the shaft portion 82 of the temperature sensor 8 may be fixed thereto (for example, a male screw is erected on the tongue portion 23d and the shaft portion 82 is screwed thereto). .

1 Temperature control device 2 Centrifugal blower 5 PTC heater (temperature change part)
6 Heat exchanger for cooling (temperature changing part)
7 Controller 8 Temperature Sensor 81 Sensing Unit 82 Shaft 83 Wiring 21 Impeller 23 Casing 23a Wall 23d Tongue 23e Discharge Port 23f Suction Port 23g Mounting Hole 24 Rotating Shaft

Claims (4)

A centrifugal blower,
An impeller provided with a plurality of blades around the rotation axis;
A casing having a spiral wall portion that guides air discharged from the impeller to a discharge port, and a suction port is formed on one side of the rotating shaft;
A temperature sensor that is fixed to a tongue that is a base point of the wall, and that detects the temperature of air sucked into the casing from the suction port;
A centrifugal blower characterized by comprising: The centrifugal blower according to claim 1,
The temperature sensor has a sensing portion and a shaft portion extending from the sensing portion,
The casing can be divided in the axial direction of the rotating shaft,
The tongue has a mounting hole extending in the axial direction of the rotating shaft,
The shaft portion is fixed to the mounting hole.
A centrifugal blower characterized by that. It is a centrifugal blower of Claim 2, Comprising:
The mounting hole is a through hole,
The temperature sensor wiring extends to the side opposite to the suction port through the mounting hole,
A centrifugal blower characterized by that. The centrifugal blower according to any one of claims 1 to 3,
A temperature changing unit that is arranged on the downstream side of the discharge port and changes the temperature of the air discharged from the discharge port by exchanging heat with the air discharged from the discharge port;
With
The operating state of the temperature changing unit changes according to the temperature detected by the temperature sensor.
A temperature control device characterized by that.

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