JPWO2019035154A1 - Outdoor unit and air conditioner - Google Patents

Abstract

The outdoor unit includes a casing constituting the outer unit of the outdoor unit, a heat exchanger installed in the casing, a non-contact temperature sensor installed on the suction side of the heat exchanger and installed in the casing, and a temperature And a member to be measured, which is installed outside the housing so as to face the sensor, changes the surface temperature according to the outside air temperature, and detects the surface temperature by the temperature sensor.

Description

  The present invention relates to an outdoor unit equipped with a device for measuring the outside air temperature, and an air conditioner equipped with the outdoor unit.

  In general, an air conditioner is equipped with a sensor that measures the outside air temperature, detects the outside air temperature, and controls the cooling speed and heating capacity of the air conditioner by controlling the rotational speed of the fan or the frequency of the compressor. I have control. Therefore, an outdoor unit of an air conditioner that includes a contact-type temperature sensor that measures the outside air temperature has been proposed (see, for example, Patent Document 1).

JP 2003-130397 A

  The outdoor unit of Patent Document 1 measures the temperature of an object to be contacted with a contact-type temperature sensor. The contact-type temperature sensor is also in contact with a fixed part of the temperature sensor and may be affected by the fixed part of the temperature sensor. In addition, the temperature sensor is located in the vicinity of the heat exchanger, and the temperature sensor and the fixed component may be affected by the heat exchanger functioning as an evaporator or a condenser. For example, when the radiant heat of the heat exchanger is transmitted to the temperature sensor, the correct outside air temperature may not be measured. In addition, the radiant heat of the heat exchanger is transmitted to the temperature sensor fixed component, and the heat of the temperature sensor fixed component is transmitted to the temperature sensor, so that the correct outside air temperature may not be measured. Since the outside air temperature detected by the temperature sensor is used for controlling the compressor and the like, high-precision detection is required.

  An object of the present invention is to solve the above-described problems. An outdoor unit including an apparatus for measuring an outside air temperature without being affected by the radiant heat of a heat exchanger and the transfer heat of a fixed part of a temperature sensor, and this It aims at providing the air conditioner provided with the outdoor unit.

  The outdoor unit of the present invention includes a housing that forms the outer shell of the outdoor unit, a heat exchanger that is installed in the housing, and a non-contact temperature sensor that is located on the suction side of the heat exchanger and installed in the housing And a member to be measured which is installed outside the housing so as to face the temperature sensor, the surface temperature is changed by the outside air temperature, and the surface temperature is detected by the temperature sensor.

  According to the outdoor unit according to the present invention, the non-contact temperature sensor indirectly detects the outside air temperature by measuring the temperature of the member to be measured. Therefore, it is possible to measure the outside air temperature without being affected by the radiant heat of the heat exchanger and the transfer heat of the fixed parts of the temperature sensor.

It is a front view of the outdoor unit which concerns on Embodiment 1 of this invention. It is a back perspective view of the outdoor unit concerning Embodiment 1 of the present invention. 1 is an exploded perspective view of an outdoor unit according to Embodiment 1 of the present invention. It is a schematic sectional drawing in the AA of the outdoor unit of FIG. It is a figure which shows the example of the 1st fixing method of the fixing member in the outdoor unit of FIG. It is a figure which shows the example of the 2nd fixing method of the fixing member in the outdoor unit of FIG. It is a figure which shows the example of the 3rd fixing method of the fixing member in the outdoor unit of FIG. It is a figure which shows the example of the 4th fixing method of the fixing member in the outdoor unit of FIG. It is the schematic sectional drawing which described the design dimension in the outdoor unit of FIG. It is the schematic sectional drawing which described the design dimension of the conventional outdoor unit provided with the contact-type temperature sensor. It is a schematic diagram which shows the structural example of the air conditioner using the outdoor unit which concerns on Embodiment 1 of this invention.

  Hereinafter, an outdoor unit according to an embodiment of the present invention and an air conditioner using the same will be described with reference to the drawings. In the following drawings, the same reference numerals denote the same or corresponding parts, and are common to all the embodiments described below. And the form of the component represented by the whole specification is an illustration to the last, Comprising: It does not limit to the form described in the specification. In the drawings, the size relationship of each component may be different from the actual one. In the present embodiment, in order to facilitate understanding, terms representing directions (for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate. This is for explanation, and these terms do not limit the present invention.

Embodiment 1 FIG.
[Configuration of outdoor unit]
FIG. 1 is a front view of an outdoor unit 100 according to Embodiment 1 of the present invention. FIG. 2 is a rear perspective view of the outdoor unit 100 according to Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view of the outdoor unit 100 according to Embodiment 1 of the present invention. The configuration of each part of the outdoor unit 100 will be described with reference to FIGS. 1 to 3 indicate the left and right width directions of the outdoor unit 100 with the X1 side as the left and the X2 side as the right. The Y axis indicates the depth direction before and after the outdoor unit 100 with the Y1 side as the front side and the Y2 side as the back side. Further, the Z-axis indicates the vertical direction of the outdoor unit 100 with the Z1 side as the upper side and the Z2 side as the lower side. In the following description, the front-rear, left-right, or upper-lower positional relationship between the constituent members of the outdoor unit 100 is, in principle, the positional relationship when the outdoor unit 100 is installed in a usable state. Further, in FIG. 3, the outer panel is omitted for explaining the internal structure of the housing 10.

  The outdoor unit 100 is an outdoor unit of an air conditioner, and FIG. 1 shows an example configured as a floor-mounted heat source side unit. The outdoor unit 100 may be configured as a heat source side unit other than the floor type, for example, a wall type, a roof type, or a ceiling suspended type heat source side unit. As shown in FIG. 2, the outdoor unit 100 includes a temperature measuring device 40 outside the heat exchanger 33 described later in the depth direction (Y-axis direction).

[Outdoor unit housing]
As shown in FIGS. 1 and 2, the outdoor unit 100 includes a housing 10 that forms an outer shell. The casing 10 is formed in a substantially rectangular parallelepiped shape by sheet metal, and the back wall 10c in which the suction port 10c1 into which the wind generated by the drive of the blower 36 is sucked is formed, and the wind generated by the drive of the blower 36 is blown out. And a front wall portion 10a in which an air outlet 10a1 is formed. Moreover, the housing | casing 10 has the left side wall part 10b and the right side wall part 10d which connect the back surface wall part 10c and the front surface wall part 10a. Moreover, the housing | casing 10 has the top panel 10e which comprises the ceiling wall of an upper surface part, and has the baseplate 10f which comprises the bottom wall of a lower surface part. Further, as shown in FIG. 2, the casing 10 of the outdoor unit 100 has a protective member 11 that faces a heat exchanger 33 to be described later and is installed in an air inlet 10 c 1 formed in the back wall portion 10 c. . The protection member 11 protects the heat exchanger 33 from contact. As shown in FIG. 2, the protection member 11 is configured in a substantially rectangular shape by combining metal wires in a lattice shape. The protective member 11 is fixed to the housing 10 by attaching attachment portions 11 a located at four corners to the back wall portion 10 c of the housing 10. Further, the protection member 11 has a lattice-like portion 11 b that is disposed between the attachment portions 11 a and is opposed to the heat exchanger 33. The grid portion 11b is configured to bulge outward from the housing 10. The protection member 11 is not limited to a configuration in which metal wires are combined in a lattice shape, and may be configured from a resin guard member having a flat plate in which a plurality of through holes are formed, for example. Good.

[Internal structure of outdoor unit]
As shown in FIG. 3, the interior of the outdoor unit 100 is partitioned into a machine room 20 and a blower room 21 by a partition plate 50. The machine room 20 located in the space on the right side of the outdoor unit 100 stores a compressor 31, refrigerant piping, a flow path switching device, an electrical box (not shown), and the like, and a space on the left side in the outdoor unit 100. In the blower chamber 21 located at, a heat exchanger 33, a blower 36 and the like are accommodated.

  The compressor 31 compresses the sucked refrigerant and discharges it in the form of a high-temperature and high-pressure gas refrigerant, and has a rotary type, scroll type, vane type, or the like, for example. The heat exchanger 33 exchanges heat between the outside air and the refrigerant, and functions as an evaporator during heating operation and as a condenser during cooling operation. The heat exchanger 33 is configured as a fin-and-tube heat exchanger that penetrates a plurality of fins in which heat transfer tubes are arranged in parallel. The heat exchanger 33 includes a heat transfer tube through which the refrigerant passes and fins for increasing the heat transfer area between the refrigerant flowing through the heat transfer tube and the outside air. The heat exchanger 33 is fixed to the bottom plate 10f so that the heat transfer tubes are horizontal. The heat exchanger 33 installed in the housing 10 is formed in a so-called L shape having a flat plate region and a curved surface region in plan view. FIG. 3 illustrates the case where the heat exchanger 33 is formed in an L shape in plan view, but the heat exchanger 33 may be formed in a flat plate shape in plan view. Also, it may be formed in a so-called U-shape having curved regions at both ends.

  The blower 36 is configured as, for example, a propeller fan such as an axial fan, and circulates air in order to efficiently perform heat exchange between the refrigerant and the air in the heat exchanger 33. The rotation axis of the blower 36 is arranged so as to face the horizontal direction in the depth direction of the housing 10. When the outdoor unit 100 is driven and the blower 36 rotates, outdoor air is taken from the outside of the outdoor unit 100 through the suction port 10c1 formed in the back wall 10c. In the heat exchanger 33, heat exchange is performed between the outdoor air that passes between the fins constituting the heat exchanger 33 and the refrigerant that flows through the heat transfer tubes. The air heat-exchanged by the heat exchanger 33 is exhausted by the blower 36 from the interior space of the outdoor unit 100 to the outside of the outdoor unit 100 through the air outlet 10a1 formed in the front wall 10a.

[Temperature measuring device]
FIG. 4 is a schematic cross-sectional view taken along line AA of the outdoor unit 100 in FIG. The configuration of the apparatus for measuring the temperature provided in the outdoor unit 100 will be described with reference to FIGS. 2 and 4. The temperature measuring device 40 includes a temperature sensor 41, a fixing member 42, and a member to be measured 43. The temperature measuring device 40 is electrically connected to the control device 25. The control device 25 is configured by, for example, hardware such as a circuit device or software executed on an arithmetic device such as a central processing unit. The control device 25 acquires information detected by the temperature sensor 41. Based on the information acquired from the temperature sensor 41, the control device 25 controls the operation of the compressor 31, the blower 36, the flow path switching device 32 described later, the indoor blower 37, and the like.

  The temperature sensor 41 is a non-contact type temperature sensor such as an infrared radiation thermometer. The temperature sensor 41 indirectly detects the outside air temperature by measuring the surface temperature of the member to be measured 43. The temperature sensor 41 is installed in the housing 10 located on the suction side of the heat exchanger 33.

  FIG. 5 is a diagram illustrating an example of a first fixing method of the fixing member in the outdoor unit of FIG. FIG. 6 is a diagram illustrating an example of a second fixing method of the fixing member in the outdoor unit of FIG. FIG. 7 is a diagram illustrating an example of a third fixing method of the fixing member in the outdoor unit of FIG. FIG. 8 is a diagram illustrating an example of a fourth fixing method of the fixing member in the outdoor unit of FIG. The fixing member 42 installs the temperature sensor 41 in the housing 10. The fixing member 42 is formed in a flat plate shape, has a flat plate portion 42 c that faces the member to be measured 43 and to which the temperature sensor 41 is attached. The material of the fixing member 42 is resin or metal. The fixing member 42 is preferably made of a resin having a low thermal conductivity, but may be made of a metal having a higher thermal conductivity than the resin. The method of fixing the fixing member 42 to the housing 10 is performed by the following method, for example. As shown in FIG. 5, the fixing member 42 has a bent portion 42d bent toward the back wall portion 10c at the upper portion of the flat plate portion 42c, and the bent portion 42d is screwed to the back wall portion 10c with a screw 45. As a result, the fixing member 42 is fixed to the housing 10. Alternatively, the fixing member 42 is fixed to the housing 10 by welding the bent portion 42d to the back wall portion 10c. Alternatively, as shown in FIG. 6, the fixing member 42 has a bent portion 42 e bent toward the protective member 11 at the upper portion of the flat plate portion 42 c, and the bent portion 42 e is screwed to the protective member 11 with a screw 45. As a result, the fixing member 42 is fixed to the housing 10. Alternatively, the fixing member 42 is fixed to the housing 10 by welding the bent portion 42 e to the protection member 11. Alternatively, as shown in FIG. 7, the fixing member 42 has a bent portion 42 f that is bent toward the front wall portion 10 a at the upper portion of the flat plate portion 42 c, and the bent portion 42 f is attached to the top panel 10 e by screws 45. The fixing member 42 is fixed to the housing 10 by being screwed. Alternatively, the fixing member 42 is fixed to the housing 10 by welding the bent portion 42f to the top panel 10e. Alternatively, as shown in FIG. 8, the fixing member 42 has a hook-shaped portion 42g that is bent toward the front wall portion 10a at the upper portion of the flat plate portion 42c. The fixing member 42 is fixed to the housing 10 by the hook-shaped portion 42g being caught by the heat exchanger 33 and the hook-shaped portion 42g being sandwiched between the heat exchanger 33 and the top panel 10e.

  The member to be measured 43 is a member whose surface temperature is changed by the temperature of the outside air and whose surface temperature is detected by the temperature sensor 41. The member to be measured 43 is installed outside the casing 10 so as to face the temperature sensor 41. As shown in FIG. 2, the member to be measured 43 includes an attachment portion 43 a that is fixed to the protection member 11 and a measurement portion 43 b that is a measurement target of the temperature sensor 41. As shown in FIG. 2, the member 43 to be measured is integrally formed with a measurement part 43b formed in a rectangular shape and a mounting part 43a formed on the side of the measurement part 43b smaller than the measurement part 43b. ing. However, the member to be measured 43 only needs to have the measurement part 43b, and the shape of the attachment part 43a may be another shape. For example, the member to be measured 43 may be a simple-shaped component in which the attachment portion 43a and the measurement portion 43b are integrated to form a single-walled flat plate. The material of the member to be measured 43 is resin, ceramic, or metal.

  The temperature sensor 41 is attached to the fixing member 42 and is installed in the housing 10 by the fixing member 42. As shown in FIG. 4, the flat plate portion 42 c of the fixing member 42 is disposed between the suction side of the heat exchanger 33 and the back wall portion 10 c. And the temperature sensor 41 is arrange | positioned at the outer side wall 42b of the fixing member 42 on the opposite side to the inner wall 42a of the fixing member 42 which faces the heat exchanger 33. FIG. In FIG. 4, a gap of a distance LD is formed between the fixing member 42 and the heat exchanger 33. However, it is not always necessary to form a gap between the fixing member 42 and the heat exchanger 33, and the fixing member 42 and the heat exchanger 33 may contact each other. Further, it is only necessary that the portion of the temperature sensor 41 for detecting the temperature faces the member to be measured 43, the fixing member 42 fixes a part of the temperature sensor 41, and the temperature sensor 41 and the heat exchanger 33 are in contact with each other. You may touch. The member to be measured 43 is attached to the lattice portion 11b of the protection member 11, and is installed outside the housing 10 outside the back wall portion 10c in the depth direction (Y-axis direction) of the housing 10. In the case of the configuration of the housing 10 in which the back wall portion 10c is disposed between the temperature sensor 41 and the member to be measured 43, the temperature sensor 41 can directly measure the temperature of the member to be measured 43. Therefore, an opening may be formed in the back wall 10c.

  FIG. 9 is a schematic cross-sectional view illustrating design dimensions in the outdoor unit 100 of FIG. In FIG. 9, the distance LA represents the distance between the heat exchanger 33 and the outer surface portion of the member to be measured 43 in the depth direction (Y-axis direction) of the outdoor unit 100. The outer surface portion of the measured member 43 is a wall portion 43d constituting the measured member 43, and the wall portion 43d is opposite to the wall portion 43c constituting the surface facing the temperature sensor 41 of the measured member 43. Configure the side surface. The wall portion 43 d of the member to be measured 43 is disposed at a position farthest away from the housing 10 among the temperature sensor 41, the fixing member 42, and the member to be measured 43. The distance LB represents the distance between the heat exchanger 33 and the member to be measured 43 in the depth direction (Y-axis direction) of the outdoor unit 100, and the outside air temperature is measured by the side surface portion of the heat exchanger 33 and the temperature sensor 41. This represents the distance to the detected part. The distance LC represents the thickness dimension of the member 43 to be measured in the depth direction (Y-axis direction) of the outdoor unit 100. Therefore, the design dimension of the outdoor unit 100 is distance LA = distance LB + distance LC.

  In FIG. 9, the distance LD represents the distance between the heat exchanger 33 and the fixed member 42 in the depth direction (Y-axis direction) of the outdoor unit 100. As described above, the heat exchanger 33 and the fixing member 42 may be in contact with each other. Therefore, the distance LD between the heat exchanger 33 and the fixing member 42 may be zero. The distance LE represents the thickness dimension of the temperature sensor 41 and the fixed member 42 in the depth direction (Y-axis direction) of the outdoor unit 100. The distance LF represents the distance between the temperature sensor 41 and the inner wall of the back wall portion 10c in the depth direction (Y-axis direction) of the outdoor unit 100, and how much the temperature sensor 41 enters from the housing 10 inside. Is a distance representing The distance LG is the distance between the outer wall of the back wall portion 10c and the member to be measured 43 in the depth direction (Y-axis direction) of the outdoor unit 100, and how much the measurement surface of the member to be measured 43 is the housing 10 It is the distance which showed whether it is necessary to install outside. The distance LH represents the thickness dimension between the inner wall and the outer wall of the back wall 10c in the depth direction (Y-axis direction) of the outdoor unit 100. Therefore, the design dimensions of the outdoor unit 100 are distance LD ≧ 0, distance LE> 0, distance LF ≧ 0, distance LG ≧ 0, distance LH> 0, distance LB = distance LD + distance LE + distance LF + distance LG + distance LH. .

  The distance LI is a distance between the temperature sensor 41 and the member to be measured 43 in the depth direction (Y-axis direction) of the outdoor unit 100. Therefore, the design dimensions of the outdoor unit 100 are distance LI = distance LF + distance LH + distance LG. The distance LJ is a distance between the heat exchanger 33 and the back wall portion 10c in the depth direction (Y-axis direction) of the outdoor unit 100. Since the outdoor unit 100 uses the non-contact type temperature sensor 41, it is not affected by the radiant heat of the heat exchanger 33. Therefore, the design dimension of the outdoor unit 100 should be distance LJ> distance LD. Can do.

  FIG. 10 is a schematic cross-sectional view illustrating design dimensions of a conventional outdoor unit 150 including a contact-type temperature sensor. An example of the outdoor unit 100 according to Embodiment 1 of the present invention will be described using FIG. 10 in comparison with an example of the outdoor unit 150 including a contact-type outside air temperature sensor. As with the outdoor unit 100, the outdoor unit 150 is provided with a heat exchanger 133 in the housing 110. The outdoor unit 150 includes a temperature sensor 141 and a fixing member 142. The outdoor unit 100 and the outdoor unit 150 have different temperature detection configurations, and the positional relationship between the heat exchanger and the housing is the same.

  The temperature sensor 141 is a contact-type temperature sensor such as a thermistor. The fixing member 142 is formed in a flat plate shape, and fixes the temperature sensor 141 outside the housing 10 in order to avoid the influence of radiant heat by the heat exchanger 133. As shown in FIG. 10, the temperature sensor 141 is installed inside the fixing member 142.

  A distance PB illustrated in FIG. 10 represents a distance between the heat exchanger 133 and the temperature sensor 141 in the depth direction (Y-axis direction) of the outdoor unit 150. Since the temperature sensor 141 is a contact-type temperature sensor, the temperature sensor 141 is disposed at an appropriate distance that is not affected by the radiant heat generated by the heat exchanger 133. The distance PC represents the distance between the heat exchanger 133 and the fixed member 142 in the depth direction (Y-axis direction) of the outdoor unit 150. The fixing member 142 is also disposed at an appropriate distance that is not affected by the radiant heat from the heat exchanger 133 because the contact-type temperature sensor 141 is disposed therein.

  As shown in FIG. 10, the temperature sensor 141 is disposed inside the fixed member 142. The distance PD represents the distance between the outer wall of the fixing member 142 and the temperature sensor 141 in the depth direction (Y-axis direction) of the outdoor unit 150. In other words, the distance PD represents the thickness dimension between the outer wall and the temperature sensor 141 in the wall portion of the fixing member located on the opposite side of the wall portion of the fixing member facing the housing 110. The distance PE represents the distance between the outer walls constituting the temperature sensor 141 in the depth direction (Y-axis direction) of the outdoor unit 150, and represents the thickness dimension of the temperature sensor 141. The distance PF represents the distance between the outer wall of the fixing member 142 and the temperature sensor 141 in the depth direction (Y-axis direction) of the outdoor unit 150. In the wall portion of the fixing member 142 facing the housing 110, the distance PF The wall thickness dimension with the temperature sensor 141 is represented. The distance PA represents the distance between the heat exchanger 133 and the outer surface portion of the fixing member 142 in the depth direction (Y-axis direction) of the outdoor unit 150. The outer surface portion of the fixing member 142 is a wall portion 142b that constitutes the fixing member 142, and the wall portion 142b is opposite to the wall portion 142a that constitutes the surface of the fixing member 142 that faces the heat exchanger 133. Configure the surface. The wall 142b of the fixing member 142 is disposed at a position farthest away from the housing 10 in the temperature sensor 141 and the fixing member 142.

  Here, attention is focused on the size of the portion of the outdoor unit 100 and the outdoor unit 150 that protrudes most from the housing 10 and the housing 110. Therefore, when the distance LA between the heat exchanger 33 and the outer surface portion of the measured member 43 is equal to the distance PA between the heat exchanger 133 and the outer surface portion of the fixing member 142 (distance LA = distance PA). Next, the difference in configuration between the outdoor unit 100 and the outdoor unit 150 will be discussed.

  When the configuration of the outdoor unit 100 is distance LA = distance PA, the relationship between the distance LB between the heat exchanger 33 and the measured member 43 and the distance PB between the heat exchanger 133 and the temperature sensor 141. Are distance LB = distance LA-distance LC and distance PB = distance PA-distance PD-distance PE. When the measured member 43 of the outdoor unit 100 and the thickness of the outer side of the fixing member 142 of the outdoor unit 150 are equal parts, the distance LC can be designed as the distance PD. In this case, distance LA = distance PA, distance LA = distance LB + distance LC, distance PA = distance PB + distance PD + distance PE, distance PE corresponding to the thickness dimension of temperature sensor 141, and distance LB> distance PB. Therefore, the outdoor unit 100 can take a distance from the heat exchanger 33 to the measurement location, and the measurement location is less affected by the radiant heat of the heat exchanger 33, and the detection accuracy of the outside air temperature is improved. To do.

  Next, with regard to the outdoor unit 100 and the outdoor unit 150, attention is paid to the distance between the heat exchanger and the measurement point of the outside air temperature. Thus, when the distance LB between the heat exchanger 33 and the member to be measured 43 is equal to the distance PB between the heat exchanger 133 and the temperature sensor 141 (distance LB = distance PB), the outdoor unit 100 The difference in configuration between the outdoor unit 150 and the outdoor unit 150 will be examined. Here, when distance LB = distance PB, the distance LA between the heat exchanger 33 and the outer surface of the member to be measured 43 is set as distance LA = distance LB + distance LC, and the heat exchanger 133 and the fixing member 142. The distance PA to the outer side surface portion is set as distance PA = distance PB + distance PD + distance PE. When the measured member 43 of the outdoor unit 100 and the thickness of the outer side of the fixing member 142 of the outdoor unit 150 are equal parts, the distance LC can be designed as the distance PD. In this case, distance LB = distance PB, distance LB = distance LA−distance LC, distance PB = distance PA−distance PD−distance PE, distance PE corresponding to the thickness of temperature sensor 141, distance LA <distance PA Become. Therefore, in the outdoor unit 100, the distance LA between the heat exchanger 33 and the outer surface portion of the member to be measured 43 can be reduced, and the size of the portion that protrudes most from the housing 10 is set to the housing of the outdoor unit 150. It can be made smaller than the size of the portion that protrudes most from 110. Therefore, the outdoor unit 100 can reduce the number of protruding portions compared to the outdoor unit 150, and can reduce the installation space.

[Air conditioner]
FIG. 11 is a schematic diagram illustrating a configuration example of the air conditioner 1 using the outdoor unit 100 according to Embodiment 1 of the present invention. In FIG. 11, solid arrows indicate the refrigerant flow during the cooling operation of the air conditioner 1, and dotted arrows indicate the refrigerant flow during the heating operation of the air conditioner 1. The air conditioner 1 in FIG. 11 includes an outdoor unit 100 and an indoor unit 200, and the outdoor unit 100 and the indoor unit 200 are connected by a refrigerant pipe 300 and a refrigerant pipe 400. In the air conditioner 1, a compressor 31, a flow path switching device 32, a heat exchanger 33, an expansion valve 34, and an indoor heat exchanger 35 are sequentially connected via a refrigerant pipe. The air conditioner 1 can be realized by switching the heating operation or the cooling operation by switching the flow of the refrigerant using the flow path switching device 32 of the outdoor unit 100. In addition, the structure of the air conditioner 1 shown in FIG. 11 is an example, For example, the muffler, the accumulator, etc. may be provided in the air conditioner 1 of FIG.

  The outdoor unit 100 includes a compressor 31, a flow path switching device 32, a heat exchanger 33, and an expansion valve 34. The compressor 31 compresses and discharges the sucked refrigerant as described above. The flow path switching device 32 is, for example, a four-way valve, and is a device that switches the direction of the flow path of the refrigerant. The air conditioner 1 can realize a heating operation or a cooling operation by switching the flow of the refrigerant using the flow path switching device 32. The heat exchanger 33 performs heat exchange between the refrigerant and air (outdoor air). The heat exchanger 33 functions as an evaporator during heating operation, and evaporates and vaporizes the refrigerant. The heat exchanger 33 functions as a condenser during the cooling operation, and condenses and liquefies the refrigerant. A blower 36 is provided in the vicinity of the heat exchanger 33 so as to face the heat exchanger 33. The expansion valve 34 is a throttling device (flow rate control means), and functions as an expansion valve by adjusting the flow rate of the refrigerant flowing through the expansion valve 34 to depressurize the refrigerant that has flowed in. For example, when the expansion valve 34 is configured by an electronic expansion valve or the like, the opening degree is adjusted based on an instruction from a control device (not shown) or the like.

  The indoor unit 200 has an indoor heat exchanger 35. The indoor heat exchanger 35 performs heat exchange between the air to be air-conditioned and the refrigerant. The indoor heat exchanger 35 functions as a condenser during heating operation, and condenses and liquefies the refrigerant. The indoor heat exchanger 35 functions as an evaporator during the cooling operation, and evaporates and vaporizes the refrigerant. An indoor blower 37 is provided in the vicinity of the indoor heat exchanger 35 so as to face the indoor heat exchanger 35.

  As described above, the outdoor unit 100 indirectly detects the outside air temperature by the temperature sensor 41 measuring the temperature of the member to be measured 43. Therefore, it is possible to measure the outside air temperature without being influenced by the radiant heat of the heat exchanger and the transfer heat of the fixing member 42 of the temperature sensor.

  In addition, in a conventional outdoor unit having a contact-type temperature sensor such as a thermistor, the temperature sensor and the fixed part, and the heat exchanger are not affected by the heat generated by the heat exchanger. An appropriate gap is required between the two. Therefore, in the conventional outdoor unit, a space for forming an appropriate gap is required between the temperature sensor and the fixed component and the heat exchanger in the housing, and the capacity of the housing is increased. On the other hand, the outdoor unit 100 indirectly detects the outside air temperature by the temperature sensor 41 measuring the temperature of the member 43 to be measured. Therefore, it is not necessary to form a gap between the temperature sensor 41 and the fixing member 42 and the heat exchanger 33, and the capacity of the housing 10 can be reduced. In addition, the outdoor unit 100 can install the temperature sensor 41 and the fixing member 42 in the housing 10, and the measurement unit 43 b of the member to be measured 43 installed outside the housing 10 may have a simple shape. It is possible to save space by reducing the part that jumps out.

  In addition, the outdoor unit is installed with a temperature sensor such that the temperature sensor is installed outside the housing or the fixing member is made of a material with low thermal conductivity so that the temperature sensor is not affected by the heat generated by the heat exchanger. Special design considerations are needed to protect against heat. On the other hand, in the outdoor unit 100, the outdoor unit 100 indirectly detects the outside air temperature by the temperature sensor 41 measuring the temperature of the member 43 to be measured. Therefore, the outdoor unit 100 does not require design consideration for installation so that the temperature sensor 41 is not affected by the heat generated by the heat exchanger 33, and the material of the fixing member 42 has a high thermal conductivity such as metal. Parts can also be adopted, and the degree of freedom in designing the outdoor unit 100 is improved.

  Further, for example, it is conceivable that an indoor unit of an air conditioner is provided with a radiation temperature sensor, and the surface temperature of a window or a wall is indirectly measured with a non-contact sensor. However, as a result of providing the temperature sensor in the indoor unit, the window or wall must be the object to be measured, and the distance between the temperature sensor and the object to be measured becomes large, and the temperature detection accuracy may deteriorate. . On the other hand, the outdoor unit 100 indirectly detects the outside air temperature by measuring the temperature of the member 43 to be measured, in which the temperature sensor 41 is attached to the protection member 11. Therefore, the outdoor unit 100 can maintain the temperature detection accuracy without the distance between the temperature sensor and the object to be measured being too far compared with the case where the object to be measured is a window or a wall. Moreover, the outdoor unit 100 can raise the detection accuracy of external temperature by installing the to-be-measured member 43 in the outer side of the housing | casing 10, and touching external air directly.

  The embodiment of the present invention is not limited to the above embodiment. For example, in FIG. 2, the temperature measurement device 40 is disposed to face the upper left portion of the heat exchanger 33, but the installation position of the temperature measurement device 40 is not limited to this position. The temperature measuring device 40 only needs to be installed on the grid portion 11b of the protection member 11, and may be disposed so as to face other portions such as a central portion and a lower right portion of the heat exchanger 33.

  DESCRIPTION OF SYMBOLS 1 Air conditioner, 10 housing | casing, 10a front wall part, 10a1 blower outlet, 10b left side wall part, 10c back wall part, 10c1 suction inlet, 10d right side wall part, 10e top panel, 10f bottom plate, 11 protection member, 11a Attachment part, 11b Lattice-like part, 20 Machine room, 21 Blower room, 25 Control device, 31 Compressor, 32 Channel switching device, 33 Heat exchanger, 34 Expansion valve, 35 Indoor heat exchanger, 36 Blower, 37 Indoor Blower, 40 Temperature measuring device, 41 Temperature sensor, 42 Fixing member, 42a Inner side wall, 42b Outer side wall, 42c Flat plate part, 42d Bent part, 42e Bent part, 42f Bent part, 42g Bent part, 43 Measured member, 43a Attachment part, 43b Measurement part, 43c Wall part, 43d Wall part, 50 Partition plate, 100 Outdoor unit, 110 Housing, 133 Heat exchanger, 141 Temperature sensor, 142 fixing member, 142a wall, 142b wall, 150 outdoor unit, 200 indoor unit, 300 refrigerant piping, 400 refrigerant piping.

Claims (7)

A housing constituting the outer shell of the outdoor unit;
A heat exchanger installed in the housing;
A non-contact temperature sensor located on the suction side of the heat exchanger and installed in the housing;
A member to be measured, which is installed outside the housing so as to face the temperature sensor, the surface temperature is changed by the outside air temperature, and the surface temperature is detected by the temperature sensor;
Outdoor unit having. Installed in the air inlet formed in the housing, further comprising a protective member for protecting the heat exchanger;
The outdoor unit according to claim 1, wherein the member to be measured is installed on the protection member.   The outdoor unit according to claim 1, further comprising a fixing member that fixes the temperature sensor to the housing.   The outdoor unit according to claim 3, wherein the fixing member is in contact with the heat exchanger.   The outdoor unit according to claim 3 or 4, wherein the fixing member is made of metal.   The outdoor unit according to claim 1, wherein the temperature sensor is in contact with the heat exchanger.   The air conditioner provided with the outdoor unit of any one of Claims 1-6.

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