Heat pump device

Abstract

To provide a heat pump device which inhibits a refrigerant leaking from a refrigerant circuit from penetrating into an electrical equipment box.SOLUTION: A heat pump device 1 includes, in a housing 10, a machine room in which a compressor 22 and an expansion device 24 are disposed and a blower room 12 in which a heat exchanger 20 and a blower 21 are disposed. The heat pump device 1 includes an electrical equipment box 30. The electrical equipment box 30 includes an electrical equipment box body 32 and a lid member 33. The electrical equipment box body 32 includes: a terminal block 51 of a cable (a main power wire) 45; a window opening 152 which the terminal block 51 faces; and a window lid body 155 which is capable of sealing the window opening 152 with a seal material sandwiched therebetween.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a heat pump device.

Background Art

[0002] In Patent Document 1, a heat pump device is disclosed which includes a refrigerant circuit that circulates a combustible refrigerant in a housing, a water circuit (heat medium circuit) through which water (heat medium) flows, and a water heat exchanger (heat medium heat exchanger) that exchanges heat between the refrigerant and water. An electric control box housing a control board and the like is arranged at the upper part of the housing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure provides a heat pump device that suppresses the intrusion of refrigerant leaked from a refrigerant circuit into an electric control box.

Means for Solving the Problems

[0005] The heat pump device in the present disclosure is a heat pump device including a machine room in which a compressor and an expansion device are arranged and a blower room in which a heat exchanger and a blower device are arranged in a housing, and includes an electric control box. The electric control box includes an electric control box body and a lid member, and the electric control box body It comprises a control board, a lead wire relay section, and a main power line relay section located on the front side of the electrical box body and separated by a partition member, wherein the partition member includes, a terminal block for the main power line A is provided, and the electrical box body is, is provided with a window opening facing the terminal block and a window lid body capable of sealing the window opening with a sealing material interposed therebetween.

Effects of the Invention

[0006] According to the present disclosure, when refrigerant leaks from the refrigerant circuit, the intrusion of the refrigerant into the electric control box can be suppressed. [Brief explanation of the drawing]

[0007] [Figure 1] Perspective view showing the heat pump device of Embodiment 1 [Figure 2] Exploded perspective view showing the heat pump device of Embodiment 1 [Figure 3] Front view showing the heat pump device of Embodiment 1 with the front panel removed. [Figure 4] Circuit diagram showing the refrigerant circuit according to Embodiment 1 [Figure 5] Exploded perspective view showing the electrical box of Embodiment 1 [Figure 6] Vertical cross-sectional view showing the electrical box of Embodiment 1 [Figure 7] Plan view showing the electrical box of Embodiment 1 [Figure 8] Enlarged perspective view of the window cover and window opening of Embodiment 1 [Figure 9] Enlarged perspective view of the window cover and window opening of Embodiment 2 [Figure 10] Enlarged plan view of the window cover and O-ring of Embodiment 2 [Figure 11] Cross-sectional view AA in Figure 10 [Figure 12] Figure 12 is a view from arrow B in Figure 10. [Modes for carrying out the invention]

[0008] (Knowledge and other information that formed the basis of this disclosure) At the time the inventors conceived of this disclosure, there was a technology in heat pump devices to prevent flammable refrigerants from igniting. This heat pump system comprises a refrigerant circuit for circulating a flammable refrigerant, a water circuit for circulating water, and a water heat exchanger for heat exchange between the refrigerant and water. The water circuit is equipped with refrigerant release valves such as a pressure relief valve and an air vent valve, which release the refrigerant to the outside of the water circuit. As a result, even if the partition separating the refrigerant circuit and the water circuit in the water heat exchanger is destroyed and flammable refrigerant mixes into the water circuit, the flammable refrigerant can be discharged to the outside of the water circuit via the pressure relief valve or air vent valve. Incidentally, the inventors discovered a problem with the above-mentioned heat pump device: if the refrigerant leaks, the refrigerant can fill the casing, potentially leading to the refrigerant entering the electrical box. To solve this problem, they arrived at the subject matter of this disclosure. Therefore, this disclosure provides a heat pump device that suppresses the ingress of refrigerant leaking from the refrigerant circuit into the electrical box.

[0009] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily verbose and to facilitate understanding for those skilled in the art. The attached drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0010] Embodiment 1 will be described below with reference to the drawings. [1-1. Structure] [1-1-1. Configuration of the heat pump system] Figure 1 is a perspective view of the heat pump device 1 according to Embodiment 1. Figure 2 is an exploded perspective view of the heat pump device 1 according to Embodiment 1. Figure 3 is a front view showing the heat pump device 1 according to Embodiment 1 with the front panel 16 removed. The heat pump device 1 shown in Figure 1 is an outdoor unit that can be used in a so-called heat pump hot water heating system. As shown in FIGS. 1 to 3, the heat pump device 1 includes a box-shaped housing 10. In the present embodiment, each part of the housing 10 is formed of a steel plate.

[0011] Inside the housing 10, a partition plate 11 extending in the vertical direction is provided. By the partition plate 11, the internal space of the housing 10 is partitioned into a blower chamber 12 and a machine chamber 13. The housing 10 includes a bottom plate 14 forming the bottom surface of the housing 10, a pair of side panels 15 covering the machine chamber 13 of the housing 10 from the front and rear, a front panel 16 covering the front surface of the blower chamber 12, and a top plate 17 covering the top surface of the housing 10. The front panel 16 is provided with a ventilation part 18 formed in a mesh shape through which air passes.

[0012] In the blower chamber 12, a heat exchanger 20 and a blower device 21 are provided. The heat exchanger 20 of the present embodiment extends substantially to the full height along the height direction of the housing 10, and is formed in a substantially L shape in a plan view of the housing 10 so as to face the rear surface 10A and the side surface 10B of the housing 10. For example, a fin-tube type heat exchanger is used as the heat exchanger 20. For example, an axial flow fan having a propeller-shaped impeller is used as the blower device 21. The blower device 21 is arranged such that the axial flow direction faces the ventilation part 18.

[0013] Inside the machine chamber 13, various devices forming a refrigerant circuit such as a compressor 22, a water heat exchanger (heat medium heat exchanger) 23, and an expansion device 24 (see FIG. 4), and refrigerant pipes 25 connecting these to each other are accommodated. For example, a plate heat exchanger is used as the water heat exchanger 23. A notch 26 is formed in the upper part of the partition plate 11, and an electric box 30 is installed in this notch 26.

[0014] [1-1-2. Configuration of Refrigerant Circuit] FIG. 4 is a circuit diagram showing the refrigerant circuit according to Embodiment 1. As shown in Figure 4, the compressor 22, four-way valve 27, water heat exchanger 23, expansion device 24, and heat exchanger 20 are connected in a ring shape via predetermined refrigerant piping 25, forming a refrigerant circuit. A predetermined water supply pipe 28 is connected to the water heat exchanger 23, and heat exchange takes place in the water heat exchanger 23 with the refrigerant circulating in the refrigerant circuit. The refrigerant, compressed to high temperature and pressure by the compressor 22, flows as shown by the solid arrows in Figure 4 and is sent to the water heat exchanger 23. There, it is cooled and condensed by the water flowing through the water supply pipe 28 through heat exchange with the water in the water heat exchanger 23. The water absorbs the heat from the refrigerant and becomes hot water, which is then supplied to, for example, user-side equipment (not shown). The refrigerant discharged from the water heat exchanger 23 is depressurized and evaporated in the expansion device 24, undergoes heat exchange in the heat exchanger 20, and returns to the compressor 22 as a gaseous refrigerant.

[0015] Furthermore, by switching the four-way valve 27, as shown by the dashed arrow in Figure 4, the refrigerant flows, exchanges heat with the outside air in the heat exchanger 20, is depressurized in the expansion device 24, and then sent to the water heat exchanger 23, thereby cooling the water flowing through the water supply pipe 28. The chilled water is supplied to the user-side equipment (not shown). In this embodiment, a flammable refrigerant is used as the refrigerant. The flammable refrigerant is R32 or a mixed refrigerant containing 70% or more by weight of R32, or propane or a mixed refrigerant containing propane. Furthermore, a non-flammable refrigerant may be used instead of a flammable refrigerant.

[0016] [1-1-3. Configuration of the electrical box] Figure 5 is an exploded perspective view showing the electrical box 30 of Embodiment 1. Figure 6 is a longitudinal cross-sectional view showing the electrical box 30 of Embodiment 1. Figure 7 is a plan view showing the electrical box 30 of Embodiment 1. As shown in Figure 2, the electrical box 30 is positioned above the blower room 12 and the machine room 13, straddling the machine room 13 and the blower room 12. The electrical box 30 is installed in the notch 26 at the top of the partition plate 11 and is supported by the partition plate 11. As shown in Figures 5 and 6, the electrical box 30 comprises a box-shaped sheet metal electrical box body 32 having an opening 31 with an open top, and a resin lid member 33 formed in a substantially rectangular, flat shape that closes the opening 31. The electrical box body 32 is made of a material with high thermal conductivity, such as a metal material. The lid member 33 is attached to the electrical box body 32 via an O-ring 38.

[0017] In this embodiment, the entire electrical box body 32 is made of metal, but only the portion located in the blower room 12 may be made of metal.

[0018] As shown in Figures 5 to 7, the electrical box body 32 comprises a rectangular blower-side portion 32A located on the blower-room 12 side and a substantially trapezoidal machine-side portion 32B located on the machine-room 13 side. The lid member 33 comprises a rectangular blower-side portion 33A located on the blower-room 12 side and a substantially trapezoidal machine-side portion 33B located on the machine-room 13 side.

[0019] A control board 40, which is made of a printed circuit board, is installed in the blower-side portion 32A of the electrical box body 32.

[0020] The control board 40, although not shown in the diagram, is equipped with electronic components such as semiconductor chips like a CPU, transistors, capacitors, and resistors, and constitutes an electrical circuit. A heat sink 41 with multiple fins is attached to the lower surface of the control board 40, and the control board 40 is installed so as to protrude downward from a bottom opening 35 provided on the bottom surface of the blower side portion 32A. The heat sink 41 is positioned on the bottom surface of the blower side portion 32A, which is close to the machine side portion 32B of the electrical box body 32. A sealing material 42 is placed around the periphery of the bottom opening 35, and the control board 40 is fixed in a state where the bottom opening 35 is closed via the sealing material 42. In this embodiment, one end of the heat sink 41 is located at the boundary between the machine side portion 32B and the blower side portion 32A. In other words, it is located at the boundary separated by the partition plate 11.

[0021] The mechanical side portion 32B of the electrical box body 32 has a main power line relay section 50 located at the front and a lead wire relay section 53 located at the back. The main power line relay section 50 has a terminal block 51 for connecting the main power line and a cable gland 52 for drawing in and sealing the main power line. The cable 45 drawn into the cable gland 52 is connected to a predetermined device such as a compressor 22. The lead wire relay section 53 has a lead wire relay module 55 for drawing in lead wires.

[0022] A terminal block 51 for connecting the cable (main power line) 45 is located in the main power line relay section (space) 50. The main power line relay section 50 corresponds to an example of a "space," and the cable 45 corresponds to an example of a "main power line."

[0023] The main power line relay section 50, where the terminal block 51 is located, is separated by a partition plate 154. The terminal block 51 is positioned on the diagonally formed partition plate 154A and faces the window opening 152 formed on the side of the electrical box body 32. Therefore, the main power line relay section 50 can be accessed from the window opening 152 without removing the cover member 33, improving maintainability.

[0024] Figure 8 is an enlarged perspective view of the window cover 155 and window opening 152 of Embodiment 1. As shown in Figure 8, a window cover 155 for sealing the main power line relay section 50 is screwed into the window opening 152, with a flat rubber packing (sealing material) 153 in between. The flat rubber packing 153 is an example of a "sealing material".

[0025] In Embodiment 1, the flat rubber packing 153 is in the form of a sheet. The window cover 155 has six protrusions (not shown) on its inner surface. The flat rubber packing 153 has six through holes 157 into which the protrusions fit. The shape of each protrusion corresponds to the shape of each through hole 157 into which it fits.

[0026] When the window cover 155 is fastened with screws, the projection is fitted into the through hole 157 of the flat rubber packing 153, and then it is fastened with screws. As a result, the flat rubber packing 153 is easily positioned and fastening with screws becomes easier.

[0027] The area of ​​the flat rubber packing 153 is at least larger than the window opening 32 and at least smaller than the window cover 155. In other words, in a plan view, the flat rubber packing 153 covers the window opening 32, and the window cover 155 covers the sealing material 153.

[0028] The flat rubber packing 153 is in sheet form. Therefore, the surface of the flat rubber packing 153 adheres closely to the inner surface of the window cover 155 and the outer periphery of the window opening 152, improving the adhesion of the main power line relay section 50.

[0029] A lid member 33 is fixed to the upper end of the electrical box body 32 via an O-ring 38 using fixing screws 37A to 37F. This creates a sealed space inside the electrical box body 32. More specifically, as shown in Figure 5, a flange 32F formed by bending sheet metal is formed on the peripheral edge of the upper end of the electrical box body 32. As shown in Figure 5, an O-ring groove 36 is formed on the peripheral edge of the lower surface of the lid member 33, and an O-ring 38 is fitted into the O-ring groove 36 to fix the lid member 33 to the flange 32F with six fixing screws 37A, 37B, 37C, 37D, 37E, and 37F. The O-ring 38 is made of foamed rubber or chloroprene rubber.

[0030] The cover member 33 is fixed to the flange 32F of the machine-side portion 32B of the electrical box body 32 by four fixing screws 37A to 37D, and to the flange 32F of the blower-side portion 32A of the electrical box body 32 by two fixing screws 37E and 37F.

[0031] The electrical box body 32 is configured such that the proportion of the volume occupied by the machine-side portion 32B is smaller than the volume occupied by the blower-side portion 32A, and the machine-side portion 32B of the electrical box body 32 is formed into a trapezoidal shape by cutting off the corners of the machine-side portion 32B. As a result, the length of the seal portion (length of the O-ring 38) between the electrical box body 32 and the lid member 33 in the mechanical side portion 32B of the electrical box body 32 is set to be shorter. Furthermore, the pitches P1, P2, and P3 of the fixing screws 37A, 37B, 37C, and 37D that secure the machine-side portion 32B are set to be shorter than the pitches P4, P5, and P6 of the fixing screws 37D, 37E, and 37F that secure the blower-side portion 32A. The machine-side portion 32B has a shorter seal length, and the pitches P1 to P3 of the fixing screws 37A to 37D are set to be shorter, thus improving the airtightness between the electrical box body 32 and the lid member 33 in the machine-side portion 32B.

[0032] The heat exchanger 20 is formed in an L-shape facing the rear surface 10A and the side surface 10B of the housing 10. As shown in Figure 7, a shielding member 60 is provided between the header pipe of the heat exchanger 20 facing the rear surface 10A of the housing 10 and the mechanical side portion 32B of the electrical box body 32. By providing the shielding member 60 near the seal portion of the mechanical side portion 32B near the header pipe, even if refrigerant is ejected from the refrigerant circuit, the phenomenon of the refrigerant directly impacting the vicinity of the seal portion is suppressed, thereby reducing the mass transfer rate of refrigerant penetration into the O-ring 38.

[0033] As shown in Figure 3, a ventilated space is formed between the lower surface of the top plate 17 of the housing 10 and the upper surface of the lid member 33. As shown in Figure 2, a partition member 39 is provided on the upper surface of the lid member 33. The partition member 39 is positioned at the boundary between the blower side portion 33A and the machine side portion 33B in a manner that closes off the aforementioned space. Multiple openings (not shown) are formed in the partition member 39 at equal intervals, allowing ventilation between the machine room 13 and the blower room 12 through these openings.

[0034] While the heat pump unit 1 is operating, the blower unit 21 is activated, creating negative pressure inside the blower chamber 12. As a result, air from the machine chamber 13 flows through multiple openings in the partition member 39 to the blower chamber 12. This airflow cools the entire upper surface of the lid member 33.

[0035] When chilled water is generated by the heat pump device 1, the water heat exchanger 23 functions as an evaporator. The water heat exchanger 23 is located in the machine room 13, and the ambient temperature around the water heat exchanger 23 becomes lower. Consequently, the temperature of the air moving from the machine room 13 to the blower room 12 becomes lower, and the lid member 33 is particularly cooled by this air. Although rainwater can enter the inside of the blower room 12, the rainwater is blocked by the partition member 39, and there is almost no rainwater entering the machine room 13.

[0036] [1-2. Operation] Next, the operation of the heat pump device 1, configured as described above, will be explained. When the heat pump device 1 is driven, the compressor 22 and the blower 21 are activated, and the axial fan also starts operating. As a result, when using hot water, the refrigerant, which has been compressed to a high temperature and pressure by the compressor 22, flows as shown by the solid arrows in Figure 4 and is sent to the water heat exchanger 23. There, the water heat exchanger 23 exchanges heat with the water flowing through the water supply pipe 28 and cools the water, which then absorbs the heat from the refrigerant and becomes hot water, which is then supplied to the designated location. The refrigerant discharged from the water heat exchanger 23 is depressurized in the expansion device 24, undergoes heat exchange in the heat exchanger 20, and returns to the compressor 22 as a gaseous refrigerant.

[0037] Furthermore, when using chilled water, by switching the four-way valve 27, the refrigerant flows as shown by the dashed arrow in Figure 4, exchanges heat with the outside air in the heat exchanger 20, is depressurized in the expansion device 24, and then sent to the water heat exchanger 23 to cool the water flowing through the water supply pipe 28. During these operations, the blower 21 is activated, causing air to flow towards the electrical box 30 located in the blower room 12.

[0038] Furthermore, the operation of the blower 21 causes air to flow onto the heat sink 41. This allows the heat sink 41 to be cooled, and the control board 40 can be cooled via the heat sink 41.

[0039] Furthermore, by screwing a window cover 155 to the window opening 152 with a sealing material 153 in between, the airtightness of the main power line relay section 50 can be improved.

[0040] [1-3. Effects, etc.]

[0041] As described above, in this embodiment, the heat pump device 1, which includes a machine room 13 in which a compressor 22 and an expansion device 24 are arranged and a blower room 12 in which a heat exchanger 20 and a blower 21 are arranged within the housing 10, is equipped with an electrical box 30, the electrical box 30 comprises an electrical box body 32 and a lid member 33, the electrical box body 32 comprises a terminal block 51 for a cable (main power line) 45, a window opening 152 facing the terminal block 51, and a window lid 155 that can seal the window opening 152 by sandwiching a flat rubber packing (sealing material) 153. With this configuration, the flat rubber packing 153 is sealed by the window cover 155, so if refrigerant leaks from the refrigerant circuit, the ingress of refrigerant into the electrical box 30 can be suppressed.

[0042] In this embodiment, the electrical box body 32 comprises a blower-side portion 32A located on the blower-room 12 side and a machine-side portion 32B located on the machine-room 13 side, and the terminal block 51 is located on the machine-side portion 32B. With this configuration, since the window opening 152 is located on the machine side portion 32B, wiring and maintenance of the cable 45 and terminal block 51 can be easily performed simply by opening the machine room side.

[0043] Furthermore, in this embodiment, the electrical box body 32 is equipped with a cable gland 52 that receives the cable (main power line) 45 and seals the electrical box body 32. With this configuration, the cable gland 52 can maintain airtightness around the cable 45 of the electrical box body 32.

[0044] Furthermore, in this embodiment, the electrical box body 32 includes a partition plate 154 that divides the main power line relay section (space) 50 where the terminal block 51 is located. The main power line relay section 50 can be accessed from the window opening 152 without removing the cover member 33, improving maintainability.

[0045] Furthermore, in this embodiment, a cable (main power line) 45 is brought into the main power line relay section (space) 50, and a cable gland 52 is provided to seal the main power line relay section 50. This configuration makes it possible to improve the airtightness of the main power line relay section 50.

[0046] Furthermore, this embodiment includes a flat rubber packing 153. This configuration ensures that the gap between the window opening 152 and the window cover 155 is sealed, improving the airtightness inside the electrical box body 32. It also improves the airtightness of the main power line relay section 50.

[0047] In this embodiment, the window cover 155 is provided with a projection (not shown) on its inner surface, and the flat rubber packing 153 is provided with a through hole 157 into which the projection fits. With this configuration, there is no misalignment between the window cover 155 and the flat rubber packing 153, which improves the airtightness inside the electrical box body 32.

[0048] (Embodiment 2) Next, Embodiment 2 will be described using the drawings. [2-1. Window Cover and Sealing Material Composition] Embodiment 2 shows another example of the window cover 155 and the O-ring (sealing material) 253. The configuration of the heat pump device 1 is the same as in Embodiment 1. The window cover 255 and the O-ring 253 of Embodiment 2 will be described below.

[0049] Figure 9 is an enlarged perspective view of the window cover 255 and window opening 152 of Embodiment 2. Figure 10 is an enlarged plan view of the window cover 255 and O-ring 253 of Embodiment 2. Figure 11 is a cross-sectional view AA of Figure 10. Figure 12 is a view taken along arrow B of Figure 10.

[0050] As shown in Figures 10 and 11, an O-ring groove 270 is formed on the inner surface of the window cover 255. The O-ring 253 fits into the O-ring groove 270. As shown in Figure 11, a central portion 257 is formed on the inner surface of the window cover 255. An upper protrusion 259 and a lower protrusion 261 are formed on the central portion 257. The lower protrusion 261 is formed to be shorter than the upper protrusion 259, which helps to suppress interference between the cable 45 and the inner surface of the cover member 33. Referring to Figures 9, 10, 11, and 12, the central portion 257 of the window cover 255 is fitted into the window opening 152, and the window opening 152 is sealed by the window cover 255 and the O-ring 253. Note that O-ring 253 is an example of a "sealing material".

[0051] [2-2. Action and Effects] A window cover 255 is screwed into the window opening 152, with an O-ring 253 in between, to seal the main power line relay section 50. As a result, the main power line relay section 50 is sealed, and the intrusion of refrigerant into the main power line relay section 50 can be suppressed.

[0052] (Other embodiments) [3. Other Embodiments] As described above, Embodiment 1 has been explained as an example of the technology disclosed in this application. However, the technology in this disclosure is not limited to this and can be applied to embodiments that have been modified, replaced, added, or omitted. Furthermore, it is possible to create new embodiments by combining the components described in Embodiments 1 and 2 above. Therefore, other embodiments are illustrated below.

[0053] In the above-described embodiment 1, the heat pump device 1 was assumed to be an outdoor unit usable for a so-called heat pump hot water heater. However, it is not limited to this, and the heat pump device 1 can be applied to various devices equipped with a refrigerant circuit, such as water heaters and air conditioning systems. In the above-described embodiment 1, the window cover 155 is configured to have multiple protrusions, but it may also be configured to have only one protrusion. In that case, there is only one through hole 157 in the flat rubber packing 153 into which the single protrusion fits. With this configuration, the surface of the flat rubber packing 153 adheres tightly to the inner surface of the window cover 155 and the outer periphery of the window opening 152, improving the adhesion of the main power line relay section 50. In addition, the window cover 155 and the flat rubber packing 153 have a simple structure.

[0054] Furthermore, in the above-described embodiment 1, the cable gland 52 was configured to be attached to the lower surface of the electrical box 30, that is, to the outside of the bottom surface 34 of the electrical box, but it may also be configured to be attached to the side of the electrical box 30. This configuration allows for a more compact layout in the vertical direction.

[0055] [Configurations supported by the above embodiment] The above embodiment supports the following configuration: (Note) (Technology 1) A heat pump system comprising a machine room in which a compressor and an expansion device are arranged, and a blower room in which a heat exchanger and a blower device are arranged, wherein the system is further equipped with an electrical box, the electrical box comprising an electrical box body and a lid member, the electrical box body comprising a terminal block for the main power line, a window opening facing the terminal block, and a window lid capable of sealing the window opening with a sealing material in between. This configuration prevents refrigerant from leaking from the refrigerant circuit and entering the electrical box.

[0056] (Technology 2) The heat pump device according to Technical 1, wherein the electrical box body comprises a blower-side portion located on the blower-room side and a machine-side portion located on the machine-room side, and the terminal block is located on the machine-side portion. With this configuration, the window opening is located on the machine room side, allowing for easy wiring and maintenance of the main power lines and terminal blocks.

[0057] (Technology 3) The heat pump device according to Technology 1 or 2, wherein the electrical box body is equipped with a cable gland for drawing in the main power line and sealing the electrical box body. This configuration allows the cable gland to maintain airtightness around the cables in the electrical box.

[0058] (Technology 4) The heat pump device according to any one of the technologies 1 to 3, wherein the electrical box body is equipped with a partition plate that divides the space in which the terminal block is arranged. The space where the terminal block is located can be accessed through the window opening without removing the cover, improving maintainability.

[0059] (Technology 5) The heat pump apparatus according to Technical Reference 4, comprising a cable gland for sealing the space into which the main power line is brought. This configuration allows for improved airtightness of the space where the terminal block is located.

[0060] (Technology 6) The heat pump apparatus according to any one of the technical specifications 1 to 5, wherein the sealing material is a flat rubber packing or an O-ring. This configuration ensures that the gap between the electrical box and the window cover is sealed, improving the airtightness inside the electrical box.

[0061] (Technology 7) The heat pump device according to any one of the Art 1 to 6, wherein the window cover has a projection on its inner surface, the sealing material is a flat rubber packing, and the sealing material has a through hole into which the projection fits. This configuration ensures that there is no misalignment between the window cover and the sealing material, thereby improving the airtightness inside the electrical box. [Industrial applicability]

[0062] This disclosure is suitably applicable to heat pump devices that can suppress an increase in refrigerant concentration around electrical components housed in an electrical box in the event of refrigerant leakage. [Explanation of symbols]

[0063] 1. Heat pump system 10 cabinets 10A back 10B Side 11 partition plates 12 Blower room 13 Machine room 14 Bottom plate 15 Side Panels 16 Front Panel 17 Top plate 18 Ventilation section 20 Heat exchanger 21 Blower 22 Compressor 23 Water heat exchanger (heat medium heat exchanger) 24. Expansion device 25 Refrigerant piping 27 Four-way valve 28 Water supply piping 30 Electrical box 31 Aperture 32 Electrical box body 32A Blower side part 32B Machine side part 32F flange 33 Lid component 33A Blower side part 33B Machine side part 35 Bottom opening 36 O-ring grooves 38 O-rings 39 Partition Member 40 Control board 41 Heat sink 42. Sealant 45 Cable (main power line) 50 Main power line relay section (space) 51 Terminal block 52 Cable Glands 60 Shielding member 152 Window opening 153 Flat rubber packing (sealant) 155, 255 Window Cover 157 Through hole 253 O-ring (sealant) 257 Central part 270 O-ring grooves

Claims

1. In a heat pump system comprising a machine room where a compressor and expansion device are located, and a blower room where a heat exchanger and blower are located, It is equipped with an electrical box, and the electrical box comprises an electrical box body and a lid member, The electrical box body comprises a control board, a lead wire relay section, and a main power line relay section located on the front side of the electrical box body and separated by a partition member. The partition member is provided with a terminal block for the main power line. The electrical box body comprises a window opening facing the terminal block and a window cover that can seal the window opening with a sealing material in between. Heat pump device.

2. The electrical box body comprises a blower-side portion located on the blower-room side and a machine-side portion located on the machine-room side, and the terminal block is located on the machine-side portion. The heat pump device according to claim 1.

3. The electrical box body is equipped with a cable gland that receives the main power line and seals the electrical box body. The heat pump device according to claim 1.

4. The main power line relay section is equipped with a cable gland that connects the main power line and seals the main power line relay section. The heat pump device according to claim 3.

5. The sealing material is a flat rubber packing or an O-ring. The heat pump device according to claim 1.

6. The window cover has a projection on its inner surface, the sealing material is a flat rubber packing, and the sealing material has a through hole into which the projection fits. The heat pump device according to claim 1.

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